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Wild Mushroom Frittata with Cheddar, spring onions, and Peas

This seasonal wild mushroom frittata is a wonderful way to celebrate earthy, woodland flavours. Combining a mix of cremini, shiitake, and oyster mushrooms with sweet spring onions and garden peas, this dish offers a sophisticated twist on a classic egg-based main. The addition of diced new potatoes ensures a satisfying texture, while a hint of nutmeg and cayenne pepper provides a subtle warmth that complements the sharp cheddar cheese perfectly.

As a versatile vegetarian option, this recipe is ideal for a light midweek supper served with a crisp green salad, or as part of a relaxed weekend brunch. It is particularly practical for home cooks as it moves seamlessly from the hob to the grill, resulting in a beautifully puffed, golden finish. Low in fuss but high in flavour, it is a nutritious choice that tastes just as good served cold in a lunchbox the following day.

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Ingredients for Wild Mushroom Frittata with Cheddar, spring onions, and Peas

  • 6 large eggs

  • 2 tablespoons milk or water

  • Salt and freshly ground black pepper

  • Pinch of freshly grated nutmeg

  • Pinch of cayenne pepper

  • 2 tablespoons unsalted butter

  • 3 new potatoes, scrubbed and cut into 1/4-in/6-mm dice

  • 4 spring onions, white and tender green parts, thinly sliced

  • 275g /280 g mixed wild mushrooms (see "It\

  • ), such as cremini, shiitake, and oyster, brushed clean and sliced', '1 garlic clove, minced', '1 teaspoon minced fresh thyme', '80g /70 g frozen peas, thawed', '60g /55 g shredded Cheddar cheese'

  1. Preheat the grill with the rack in the second position from the top.

  2. In a medium bowl, whisk together the eggs, milk, 1/2 teaspoons salt, a few grinds of pepper, the nutmeg, and cayenne.

  3. In a 12-in/30.5-cm ovenproof skillet over medium-high heat, melt the butter. When the butter is melted and hot, add the potatoes and a sprinkle of salt and pepper. Cook the potatoes, stirring every now and then, until they begin to soften, about 3 minutes. Add the spring onions, mushrooms, garlic, thyme, and another sprinkle of salt and pepper and continue to cook and stir until the mushrooms have given off their liquid and are dry, about 4 minutes. Add the peas and cook until all of the veggies are tender and the peas are warmed through, another minute or two. Taste and adjust the seasoning. Spread the filling evenly over the bottom of the pan and sprinkle the cheese over the top.

  4. Pour the eggs evenly over the vegetables in the pan and reduce the heat to low. Cover the pan and cook for 2 minutes, then remove the lid and transfer the pan to the grill. Grill the frittata until the top is lightly browned and the eggs have firmed up in the centre, about 4 minutes. To test, press the centre of the frittata lightly with your finger. If it feels firm, it's done.

  5. Remove the frittata from the oven and let it rest for 3 minutes on a wire rack on the countertop to continue to firm up before cutting it into wedges. It will be puffy when it comes out of the oven but will deflate and become firmer as it cools. Serve the frittata hot or at room temperature.

Disclaimer

While every effort has been made to ensure the information is accurate and up to date, individual needs may vary and dietary requirements can differ based on personal health conditions. Always check food labels and allergen information before preparing or consuming any recipe. If you have specific health concerns, allergies, intolerances, or are following a medically prescribed diet, seek advice from your GP, pharmacist, or a registered dietitian before making significant changes to your diet or lifestyle.

Article history

The information on this page is peer reviewed by qualified clinicians.

  • 28 Jan 2026 | Originally published

    Authored by:

    UK recipe editors

    Peer reviewed by

    UK recipe editors
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