Zucchini, Onion and Ricotta Pie (Torta Salata di Zucchine e Cipolle)

Ingredients

• 1⁄4 cup olive oil
• 2 cloves garlic, thinly sliced
• 1 shallot, thinly sliced
• 6 medium zucchini, thinly sliced
• 1⁄2 cup grated pecorino
• 1⁄2 cup ricotta
• 1⁄2 cup roughly chopped parsley
• 4 eggs, beaten
• Kosher salt and freshly ground black pepper, to taste
• 1 tbsp. unsalted butter
• 3 tbsp. bread crumbs