Leek and Mushroom Frittata
This tasty egg recipe is hard to beat (ha!). It’s fancy-looking but super easy to make, especially if you use this pro tip: cut veggies and herbs, shred cheese and mix eggs and sour cream the night before and stash in fridge to streamline prep and cooking).

You can whip it up for the fam or when you’re having guests for breakfast or brunch. It tastes great fresh from the oven, served at room temperature or cold. Plus, it’s packed with filling protein and delicious flavor that everyone will love.

Leek and Mushroom Frittata
Ingredients
- 6 whole eggs
- 6 egg whites
- ½ cup light sour cream
- 8 ounces mushrooms, such as button, oyster, or cremini, finely chopped
- 2 large leeks, thoroughly cleaned
- ¼ teaspoon kosher salt, or more to taste
- 4 ounces feta or fontina cheese, crumbled
- 3 to 4 sprigs of fresh thyme, leaves removed from stems
- 1 small bunch fresh chives, about 5, chopped
Instructions
- In a large bowl, blend the eggs, egg whites with sour cream. Add pinch kosher salt, and 2 tablespoons thyme leaves. Set aside and allow it to reach room temperature.
- Preheat oven to 350˚.
- Liberally coat a large oven-safe skillet with olive oil spray and warm over on medium/med-high heat. Add chopped leeks, cook 5 minutes, stirring occasionally. Add mushrooms, cook another 5 mins or until liquid is absorbed.
- Add ¼ teaspoon kosher salt and mix through. Spread veggies out evenly in skillet (it will look like a lot). Crumble ½ the cheese evenly over the top (2 ounces).
- Very slowly add the egg/sour cream mixture over the veggies and cheese. Sprinkle on remaining cheese (crumbling up large pieces). Cook about 3 to 5 minutes, or until sides start to look a little done.
- Put the oven-safe skillet into oven for 15 to 25 minutes or until it looks nearly set and the middle puffs up, but the top should not brown. (It will continue to cook when you take it out.)
- Top with chopped chives.

Tasted rich and decadent! We loved the flavor combo. I made it just for fun and enjoyed the leftovers for a few days. The fancy mushrooms and fontina combo is magic. And I forgot how much I adore leeks! Followed the recipe exactly and would definitely make again.
Hi Alli. We’re so happy that you enjoyed the soup, especially the combo of mushrooms and cheese! And leeks are an often forgotten and under-appreciated vegetable, so it’s nice to show them some love now and again. This soup is a wonderful way to feature them and play up their delicious flavor! Thanks for stopping by to share your thoughts—we love hearing from you.
—Team Joy