1. Crank your oven to 350°F and make sure your skillet handle is oven-safe (trust me on this one). Grease a 9-inch oven-safe skillet really well with butter or oil.
2. Heat the skillet over medium heat and toss in those diced peppers. Sauté for 3-4 minutes until they’re tender and getting slightly charred in spots. Add the spinach and keep stirring—it’ll wilt down in about 2 minutes. Remove from heat.
3. In a bowl, crack the eggs and whisk together with milk, salt, pepper, and garlic powder. Whisk until you see tiny bubbles forming on top—that means you’ve got enough air for a fluffy frittata.
4. Pour the egg mixture right over your sautéed vegetables in the skillet. Give the pan a gentle shake to distribute everything evenly.
5. Put the skillet back on medium heat and cook for 3-4 minutes, gently pulling the edges toward the center occasionally with a spatula so uncooked egg can flow underneath. The edges should be set but the center should still look wet and jiggly—don’t overcook it on the stovetop.
6. Sprinkle that mozzarella cheese on top (add extra if you’re feeling cheesy—I always do).
7. Slide the whole skillet into your preheated oven and bake for 15-20 minutes. Start checking at 15 minutes—it’s done when the center barely jiggles and a knife inserted in the middle comes out clean.
8. Let it cool for 5 minutes before slicing into wedges. If you cut it too soon, it’ll be a runny mess (learned that the hard way).

Nutrition Information (Per Serving):

• Calories: 145
• Carbohydrates: 5g
• Protein: 11g
• Fat: 9g
• Fiber: 1g
• Sodium: 320mg
• Vitamin A: 65% DV
• Vitamin C: 80% DV
• Calcium: 12% DV

This frittata packs serious vitamin A and C from the peppers and spinach, plus quality protein from the eggs—basically a complete breakfast that doesn’t taste virtuous.

Notes:

• Seriously, make sure your skillet handle is oven-safe. I’ve melted handles before and it’s not fun.
• Don’t overcook on the stovetop—the edges should be set but the center should still look wet before it goes in the oven.
• Every oven runs differently, so start checking at 15 minutes. Frittatas go from perfect to overcooked fast.
• Fresh spinach shrinks down dramatically, so don’t worry when it looks like too much at first.
• Let it rest for 5 minutes before cutting or it’ll fall apart.

Storage Tips:

This spinach pepper frittata keeps beautifully in the fridge for 3-4 days, making it perfect for meal prep. Let it cool completely, then cover tightly with plastic wrap or store in an airtight container. Reheat individual slices in the microwave for 30-45 seconds, or eat it cold straight from the fridge (honestly delicious either way). Don’t freeze this one—the eggs get weird and rubbery when thawed. If you’ve got leftovers, they make fantastic sandwich filling or can be chopped up and added to salads.

Serving Suggestions:

• Classic Brunch: Serve with buttered toast, fresh fruit, and crispy bacon for a complete weekend breakfast spread
• Light Lunch: Pair with a simple arugula salad dressed with lemon and olive oil for a satisfying midday meal
• Breakfast Sandwich: Slide a wedge between toasted English muffins with hot sauce for an on-the-go breakfast
• Dinner Option: Serve alongside roasted potatoes and a green salad for an easy breakfast-for-dinner night

Mix It Up (Recipe Variations):

Mediterranean Frittata: Swap mozzarella for crumbled feta, add sun-dried tomatoes, and finish with fresh basil. Tastes like vacation on the Greek islands.

Holiday Spinach Frittata: Use goat cheese instead of mozzarella and add caramelized onions for a fancy special-occasion version that looks impressive but isn’t hard.

Cheesy Veggie Frittata: Double the mozzarella and swap spinach for small broccoli florets. My kids actually request this version, which is saying something.

Spicy Pepper Frittata: Add a diced jalapeño with the bell peppers and sprinkle red pepper flakes on top. Perfect wake-up call for those mornings you need an extra kick.

What Makes This Recipe Special:

This spinach pepper frittata follows traditional Italian stovetop-to-oven technique that creates a golden crust on the bottom while keeping the center custardy and tender. Unlike scrambled eggs or omelets, a proper frittata is firm enough to slice into wedges but never rubbery. The method ensures even cooking without constant attention—you get that gorgeous presentation without the stress of flipping or folding.