Preheat your oven to 375°F (190°C).
Chop your seasonal vegetables into bite-sized pieces and set aside.
Heat olive oil in a frying pan over medium heat until shimmering.
Sauté the chopped vegetables for about 5 minutes, stirring occasionally, until they soften and just start to brown around the edges.
In a large mixing bowl, whisk together the eggs with a pinch of salt and pepper until fully combined and slightly frothy.
Add the sautéed vegetables, chopped herbs, and shredded cheese to the eggs, gently folding everything together.
Pour the mixture into a greased oven-safe baking dish, spreading it out evenly.
Place the dish in the preheated oven and bake for approximately 20 minutes, until the top is golden and the filling is puffed and just set.
Remove the frittata from the oven and let it rest for a few minutes before slicing.
Slice into wedges and serve warm, enjoying the fluffy texture and vibrant flavors.