Supper with Stella

Ingredients

• 1 pre-made (or store-bought) pie crust
• 3 Tbsp. olive oil, divided
• 1 onion, diced
• 1/2 bell pepper, diced
• 2 small eggplants, sliced
• 2 medium zucchini, sliced
• 2 medium summer squash, sliced
• 3 medium tomatoes, sliced
• 1/2 cup gruyere cheese, grated
• salt & pepper, to taste