Preheat oven to 400 degrees. Arrange the vegetables in a single layer on a baking sheet, season with salt and pepper and spray with cooking spray. Roast until tender and browned about 30 minutes. Remove from oven and set aside to cool.
Meanwhile, in a medium bowl, whisk together the eggs and season well with salt and pepper.
In a 10-inch oven-safe skillet, add the roasted vegetables, egg mixture and top with the feta cheese.
Sprinkle with parsley and bake for 25-35 minutes, until the frittata has puffed and the center is set. Allow to cool for 10 minutes before slicing into wedges. Serve warm.
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Notes
Erren’s Top Tips
Roasting is everything here. If the vegetables aren’t slightly browned, you’re leaving flavor on the table.Don’t overcrowd the baking sheet. If they steam instead of roast, the frittata can turn watery.Grease your pan well. Eggs love to stick, especially with roasted vegetables.If the top browns too quickly, loosely cover with foil while finishing baking.For extra flavor, add a squeeze of lemon juice right before serving to brighten everything.
Variations & Add-Ins
Add cooked Italian sausage or pancetta for a heartier version with more depth.Stir in sun-dried tomatoes or olives for a stronger Mediterranean flavor.Swap feta for goat cheese for a creamier, slightly milder finish.Add a handful of spinach after roasting for extra greens without overpowering the dish.
Storage & Freezing
Store leftovers in the fridge for up to 4 days. Reheat gently in the oven or microwave.Freeze individual slices wrapped tightly for up to 2 months. Thaw overnight in the fridge before reheating.For best texture, reheat in the oven at 325°F until warmed through instead of microwaving.