Frittata containing aubergines, sweet pointed peppers and tomatoes

These are the ingredients you need

2 aubergines - 2 sweet pointed peppers - 40 oven-dried tomatoes - 3 tablespoons olive oil - 3 garlic cloves - 4 sprigs fresh oregano - salt and pepper - 6 eggs - 4 tablespoons milk - 75 g Parmesan cheese 

Preparation