• Eggs (6-8): The base of the dish, providing structure and richness.
• Cheese (1 cup, e.g., feta or cheddar): Adds creaminess and flavor depth.
• Vegetables (1-2 cups, e.g., bell peppers, onions, spinach): Contributes color, nutrition, and texture.
• Meats (optional, e.g., diced ham or bacon): For added flavor and protein.
• Herbs (e.g., parsley or chives): Enhances freshness and aroma.
• Salt and pepper (to taste): Essential for seasoning the dish.

These ingredients are crucial as they create a harmonious blend of flavors and textures, resulting in a satisfying meal.

1. Preheat the Oven: Preheat your oven to 375°F (190°C).
2. Sauté Vegetables: In an oven-safe skillet, heat a tablespoon of olive oil over medium heat. Add diced onions and bell peppers, cooking until softened (about 5 minutes). If using spinach, add it last to wilt it quickly.
3. Prepare Egg Mixture: In a bowl, whisk together the eggs, salt, and pepper. Stir in the cheese, herbs, and any optional meats.
4. Combine: Pour the egg mixture over the sautéed vegetables in the skillet, gently stirring to distribute evenly.
5. Cook on Stovetop: Let the frittata cook undisturbed for about 3-4 minutes, until the edges begin to set.
6. Bake: Transfer the skillet to the preheated oven and bake for 15-20 minutes, or until the frittata is fully set and golden on top.
7. Serve: Remove from the oven, let cool for a few minutes, then slice into wedges and serve warm or at room temperature.