Spinach-Ricotta Quiche

Ingredients (11)

• ✓ 1 tablespoon butter
• + ⅓ cup finely chopped red onion add to pantry
• + 1 (8 ounce) package fresh spinach add to pantry
• + ½ (14 ounce) package pastry for 9-inch double-crust pie add to pantry
• ✓ 4 large eggs
• + ¾ cup whole-milk ricotta cheese add to pantry
• + ¾ cup heavy cream add to pantry
• + ⅓ cup grated Parmigiano-Reggiano cheese add to pantry
• + 1 tablespoon chopped fresh basil add to pantry
• + ½ teaspoon salt add to pantry
• ✓ ¼ teaspoon ground black pepper