Step 1: Begin by preheating your oven to 375°F (190°C). Lightly grease a 9-inch pie plate, a small oven-safe skillet, or an 8x8 inch baking dish with olive oil or cooking spray. This crucial step prevents sticking and helps create that desirable golden crust, a hallmark of excellent leftover spaghetti recipes.
Step 2: In a large mixing bowl, combine your fresh eggs, milk, half of the grated Parmesan cheese, dried oregano, salt, and black pepper. Whisk vigorously until homogeneous and slightly frothy. Seasoning is important, as this egg mixture will carry the flavor for your entire baked leftover spaghetti recipes creation.
Step 3: Add your cold, glorious leftover cooked spaghetti (and any clinging sauce) directly into the whisked egg mixture. Using tongs or your hands, gently but thoroughly toss the spaghetti. Ensure every single strand is coated with the egg mixture for a cohesive, solid frittata. This even coating is what elevates simple leftover spaghetti recipes to a dish of distinction.
Step 4: Carefully pour the entire spaghetti-egg mixture into your prepared baking dish. Spread it out evenly, pressing down gently with a spoon or spatula to compact it slightly. Ensure an even thickness for uniform baking, vital for all baked leftover spaghetti recipes.
Step 5: Generously sprinkle the remaining half of the grated Parmesan cheese, along with all of the shredded mozzarella cheese, evenly over the top. This layer will melt into a beautiful, bubbly, golden-brown crust, adding both flavor and appealing texture to these leftover spaghetti recipes.
Step 6: Carefully place your baking dish into the preheated oven. Bake for approximately 25-30 minutes, or until the frittata is set, the top is beautifully golden brown, and the cheese is bubbling and lightly caramelized. The eggs should be fully cooked through.
Step 7: Once baked, remove from the oven and let it cool for about 5-10 minutes on a wire rack. This crucial resting period allows the frittata to set further, making for cleaner, neater slices. Slice into wedges or squares, and serve warm. This delightful dish truly redefines how delicious and versatile leftover spaghetti recipes can be. Enjoy!