Method
Step 1: Prepare the Vegetables
In a skillet, heat the olive oil over medium heat. Add the chopped onion and bell pepper. Sauté until they are soft, about 5-7 minutes.
If using, add the spinach or any leafy greens and cook until wilted. Season with salt and pepper to taste.
Step 2: Mix the Base
In a large mixing bowl, combine the cooked rice, sautéed vegetables, grated Parmesan cheese, milk, and eggs. Mix well until all ingredients are evenly incorporated. You can also add herbs or spices if desired.
Step 3: Cook the Frittata
Wipe the skillet clean and add a little more oil if needed. Pour the rice mixture into the skillet, spreading it evenly. Cook on medium heat for about 5-7 minutes, or until the bottom is set and lightly golden.
Preheat your oven to 350°F (175°C) if finishing in the oven. If your skillet is oven-safe, transfer it directly to the oven; otherwise, carefully slide the frittata onto a baking dish.
Bake for 10-15 minutes or until the top is set and golden.
Step 4: Let it Stand
Once cooked, let the frittata stand for about 5 minutes before slicing. This helps it firm up and makes it easier to serve.
Step 5: Serve
Cut into wedges and serve warm or at room temperature. Garnish with fresh herbs if desired.
Variations
Vegetarian: This recipe is already vegetarian-friendly. Just ensure any cheese used is vegetarian-friendly.
Vegan: Substitute eggs with a mixture of 1 cup of silken tofu blended with a tablespoon of nutritional yeast and a teaspoon of turmeric for color.
Add-ins: You can add cooked bacon, ham, or sautéed mushrooms for a heartier version.
Spice it up: Add a pinch of red pepper flakes or some chopped jalapeños for a spicy kick.