Golden Potato and Spinach Frittata with Cheddar
A potato and spinach frittata makes a satisfying meal from a short list of familiar ingredients. Thin potato slices give it substance, wilted spinach adds a green layer, and cheddar melts through the eggs while helping the top develop golden patches. Cut into wedges, it works just as well for a relaxed breakfast as for a simple dinner.
The method begins on the stove and finishes in the oven. Cooking the potato before adding eggs is the crucial step: the egg mixture sets much more quickly than raw potato becomes tender. Once the vegetables are ready, the oven provides gentle, even heat without requiring you to flip a heavy frittata.
Use a skillet that is explicitly oven-safe, including its handle. A 24 cm pan produces useful depth for this quantity. Let the finished frittata rest for a few minutes before cutting, then serve with a fresh salad or simply enjoy a warm wedge on its own.
Recipe at a glance
- Serves: 4
- Preparation: about 15 minutes
- Cooking: approximately 30 minutes
- Resting: 5 minutes
- Oven: 190°C conventional / 170°C fan
- Equipment: 24 cm oven-safe skillet, lid, bowl, whisk, spatula, food thermometer
Ingredients
- 450 g potatoes, scrubbed or peeled
- 80 g onion, thinly sliced
- 100 g fresh baby spinach, washed and dried
- 6 large eggs
- 60 ml milk
- 80 g cheddar, grated and divided
- 2 tablespoons olive oil
- 1/2 teaspoon fine salt, divided
- 1/4 teaspoon black pepper
- 2–3 tablespoons water, only as needed while cooking the potatoes
- 1 teaspoon chopped parsley, optional garnish
Choose a potato that holds its shape reasonably well after cooking. A general-purpose or waxy variety gives clear slices inside each wedge. The cheese provides richness, so this version needs only a little milk rather than a large amount of cream.
Slice the potatoes evenly
Cut the potatoes into slices about 2 mm thick. Consistent thickness helps them soften at the same rate. A mandoline can be useful if you use its guard, but a sharp knife works well enough when you take your time.
Very thick pieces may remain firm after the eggs have set. Extremely thin shavings can break apart before you assemble the frittata. Aim for recognizable slices that you can turn gently with a spatula without turning the pan into mashed potato.
Pat the slices dry if they have been rinsed. You want some surface contact with the hot oil, followed by a short covered stage to finish softening them. Leaving a lot of rinse water on the potatoes makes the amount of liquid in the skillet harder to control.
Cook the potato and onion first
Heat the olive oil in the skillet over medium heat. Add the potatoes and onion with half the salt. Turn gently to coat, then cook for about 4 minutes, allowing a little light color to develop without letting the onion burn.
Lower the heat, cover, and cook for another 8–12 minutes, turning the mixture carefully a few times. If the pan begins to stick before the potato softens, add a tablespoon of water and cover again. Use only what is needed; the aim is tender slices with no standing liquid.
Check several pieces with the tip of a knife. They should be tender all the way through. If they are still firm, continue cooking before moving on. The oven stage is primarily for setting the eggs, so it should not be asked to rescue undercooked potato.
Wilt and distribute the spinach
Add the dry spinach to the skillet, a handful at a time if necessary. Stir gently until it wilts, then cook uncovered for another minute or two so any released moisture can evaporate. Wet spinach leaves water around the vegetables and makes the frittata less predictable.
Spread the potato and spinach mixture across the pan in an even layer. Keep a few attractive potato slices toward the surface, but avoid building a thick mound in the middle. A fairly level arrangement lets the eggs flow into the spaces between the vegetables.
If using frozen spinach, thaw and squeeze it thoroughly before measuring about 70 g for this recipe. It is already compact and cooked, so it behaves differently from a large handful of fresh leaves. Fold it through the potatoes and warm it before adding eggs.
Mix and add the eggs
While the vegetables cook, heat the oven to 190°C conventional or 170°C fan. Whisk the eggs, milk, remaining salt, and pepper in a bowl until the whites and yolks are combined. Stir in 60 g of the cheddar, reserving the final 20 g for the top.
Lower the skillet heat before pouring in the egg mixture. Tilt the pan slightly so it reaches the edges, then use the spatula to open a few small spaces between potato slices. Avoid vigorous stirring, which would scramble the eggs and break the layers apart.
Cook on low heat for about 2 minutes, just until the outer edge begins to set. Scatter the reserved cheddar over the surface. This short stove stage establishes the base; do not wait for the entire center to cook before transferring the pan.
Finish gently in the oven
Move the skillet to the middle of the preheated oven. Bake for approximately 10–15 minutes, checking toward the earlier end of the range. The surface should be set, the center should no longer look liquid, and a food thermometer inserted into the middle should reach 71°C / 160°F.
Pan material and depth influence the timing. A heavy skillet retains heat differently from a thin one, and a smaller pan creates a thicker frittata. Use the center temperature and texture to guide you rather than assuming every oven will finish at exactly the same minute.
If the top colors before the center is ready, loosely shield it with foil and continue baking. A little golden cheese is attractive, but strong browning alone does not tell you whether the eggs inside are cooked. Avoid prolonged baking once the center reaches the target, since the edges can become rubbery.
Rest, slice, and serve
Set the hot skillet on a heatproof surface and leave the frittata for 5 minutes. Keep a towel or oven glove visibly over the handle as a reminder that it remains hot. The short rest allows the eggs and cheese to settle, making the wedges easier to lift.
Run a flexible spatula around the edge, cut into four wedges, and lift carefully from underneath. Add the optional parsley just before serving. The potato layers and spinach should remain visible through the cut side rather than being hidden beneath a heavy garnish.
For a lighter lunch, divide it into six smaller wedges and serve with a salad. A tomato and cucumber salad gives a useful fresh contrast to the warm potatoes and eggs. Any side dish is separate from the listed recipe quantities, so choose it according to the meal you are planning.
Make-ahead and reheating
The frittata can be baked ahead and refrigerated promptly once portioned into suitable shallow containers. Store covered and use within 3 days. Keep it chilled until you are ready to serve or reheat, rather than leaving the whole skillet on the counter between meals.
Reheat a wedge until its center reaches 74°C / 165°F. An oven gives more even warming for several portions, while a microwave is convenient for one. Cover loosely during warming if the exposed surface is drying, then uncover briefly if you want the top to feel less moist.
Freezing is possible, though cooked potato and egg can change texture after thawing. Freeze individual cooled wedges, thaw in the refrigerator, and reheat thoroughly. For the best texture, a fresh batch or short refrigerated storage is preferable.
Simple variations
Use mature cheddar for a stronger cheese flavor or a mild cheddar for a gentler finish. A handful of chopped chives can replace the parsley garnish. Keep additional vegetables modest, and cook away their moisture before adding eggs.
Milk can be replaced with the same amount of unsweetened plain plant milk, though the result may taste slightly different. Omitting the cheese changes the richness and seasoning; taste the cooked vegetables and keep any salt adjustment restrained.
Frequently asked questions
Can I bake everything from raw?
This method relies on precooked potato. Adding raw slices directly to the eggs risks a set frittata with firm potato in the center.
Can I use a larger skillet?
Yes, but the frittata will be thinner and may finish sooner. Begin checking the center earlier and avoid overcooking the edges.
Why did it stick?
The pan may have had an unsuitable surface, insufficient oil, or rough handling before the eggs settled. Loosen the edges gently and support the entire wedge when lifting.
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