Summer Vegetable Egg Bake with Swiss Chard and Cheddar
A hearty one-pan breakfast casserole combining fresh summer vegetables with eggs and cheese. Swiss chard stems and leaves add earthy flavor while red bell peppers and zucchini bring sweetness and texture. The cast-iron skillet creates a beautifully browned bottom while keeping the center tender. Perfect for weekend brunch, meal prep, or feeding a crowd. This rustic bake showcases seasonal produce at its peak and can be served warm or at room temperature.
Ingredients
- 6 large eggs
- ½ cup low-fat milk
- 2 ½ tablespoons olive oil
- ½ medium red onion, diced
- 2 cloves garlic, minced
- 5 cups Swiss chard, choppedspinach1:1High confidence substitute with similar cooking timeFull guide →
- 1 cup red bell peppers, dicedyellow bell pepper1:1High confidence direct substituteFull guide →
- 1 cup zucchini, gratedyellow squash1:1High confidence similar texture and moistureFull guide →
- 1 ¼ teaspoons dried oregano
- 1 teaspoon dried thyme
- 1 teaspoon kosher salt
- 1 cup white cheddar cheese, shreddedgruyere1:1Medium confidence for nuttier flavor
removes:dairy
Instructions
- 1
Preheat oven to 375°F and position rack in center
- 2
Whisk eggs and milk together in small bowl and set aside
- 3
Heat olive oil in large cast-iron skillet over medium-high heat
- 4
Add onions and cook for 2 minutes until softened
- 5
Add garlic and cook until fragrant
- 6
Mix in Swiss chard stems and bell pepper, sauté for 2 minutes
- 7
Add Swiss chard leaves and cook until wilted
- 8
Add zucchini, oregano, thyme and salt, stir to combine
- 9
Turn off heat and pour egg mixture into skillet
- 10
Sprinkle cheese over eggs and vegetables
- 11
Stir to distribute vegetables evenly
- 12
Bake for 25 to 28 minutes until cheese browns
- 13
Cool for few minutes before slicing into wedges
Tips
Use a 12-inch cast-iron skillet for best browning and even cooking throughout the bake.
Separate Swiss chard stems from leaves and cook stems first as they need more time to soften.
Let the bake cool slightly before cutting to help it hold together when slicing into wedges.
Good to Know
Refrigerate covered for up to 3 days. Reheat individual portions in microwave or warm whole bake in 300°F oven.
Can be assembled night before and refrigerated. Add 5-10 minutes to baking time if cooking from cold.
Serve warm or at room temperature. Cut into wedges and garnish with fresh herbs if desired.
Common Mistakes
Don't skip cooling time to avoid messy, runny slices when cutting
Cook chard stems before leaves to prevent tough, undercooked stems
Use oven-safe skillet to avoid transferring hot mixture and losing heat
Substitutions
FAQ
Can I make this without Swiss chard?
Yes, substitute with spinach, kale, or any leafy green. Adjust cooking time as spinach wilts much faster than chard.
How long does this keep in the refrigerator?
Store covered for up to 3 days. Reheat portions in microwave or warm entire bake in low oven.
Can I freeze this egg bake?
Yes, wrap cooled bake tightly and freeze up to 2 months. Thaw overnight and reheat in 300°F oven until warmed through.