Egg Vegetable Casserole

How This Egg Vegetable Casserole Won Me Over

I’ll admit, the idea of an Egg Vegetable Casserole didn’t thrill me at first. I’m not a casserole person, the word alone makes me think of canned soup and mushy textures. But when my husband Josh wanted to make one for a brunch with friends, he convinced me. He basically made a frittata in a 9×13 pan, using eggs, onions, red and yellow peppers, tomatoes, spinach, and mozzarella. He whipped it together fast, and when it came out of the oven, it looked gorgeous. It fed everyone easily. So I guess casseroles aren’t all bad. At least this one isn’t.

Why This Egg Vegetable Casserole Is a Crowd-Pleaser

• It uses 18 eggs, so it easily feeds a big group for brunch or breakfast.
• The colorful veggies and melted mozzarella make it look as good as it tastes.
• You can prep it the night before and bake it in the morning, perfect for hosting.

Key Ingredients for This Egg Vegetable Casserole

• Eggs: The base of the casserole. Use large eggs for best results. You can substitute up to half with egg whites for a lighter version.
• Spike seasoning: A savory all-purpose seasoning blend. If you don’t have it, Italian seasoning works as a direct swap.
• Mozzarella cheese: Adds mild, melty richness. Shred it yourself for better melt. Cheddar or provolone are good alternatives.

Kitchen Tools for This Egg Vegetable Casserole

• Large bowl for whisking eggs
• Whisk
• Large skillet for sautéing vegetables
• 9×13-inch baking dish (Pyrex or metal)
• Knife and cutting board for dicing vegetables

Tips for Making the Best Egg Vegetable Casserole

Don’t overbake this casserole. Check it at 35 minutes, the eggs should be set and the top golden. If you don’t have Spike seasoning, Italian seasoning works well.

Sauté the peppers and onion first to soften them, then add the spinach just until it wilts. Stir the mozzarella into the egg mixture evenly so every bite has cheese. For a cleaner slice, let the casserole rest for 5 minutes after baking.

Make-Ahead Egg Vegetable Casserole Tips

This casserole is perfect for prepping the night before. After you sauté the veggies and whisk the eggs, combine everything in the greased 9×13 dish. Cover and refrigerate overnight. The next morning, let it sit on the counter for 30 minutes while the oven preheats. Bake as directed, adding 5-10 minutes if needed since it starts cold. This makes hosting brunch a breeze.

Egg Vegetable Casserole Variations to Try

You can easily swap the vegetables based on what you have. Mushrooms, zucchini, or broccoli all work. For cheese, try sharp cheddar, feta, or goat cheese instead of mozzarella. If you want meat, add cooked crumbled sausage, bacon, or diced ham. To make it dairy-free, skip the cheese and use a non-dairy milk. You can also use a mix of whole eggs and egg whites to lighten it up.

What to Serve with Egg Vegetable Casserole

This casserole is hearty enough on its own, but a few sides make it a full brunch spread. A fresh fruit salad balances the richness. Toast or bagels with butter are classic. For a savory touch, serve roasted potatoes or a simple green salad. And don’t forget the hot sauce or salsa for those who like a kick.

How to Store Leftover Egg Vegetable Casserole

Let the casserole cool completely, then cover the dish with foil or plastic wrap. Store in the refrigerator for up to 4 days. You can also transfer individual portions to airtight containers for easy grab-and-go breakfasts.

Can You Freeze Egg Vegetable Casserole?

Yes, this casserole freezes well. Cool it completely, then wrap the whole dish tightly in plastic wrap and foil, or slice it into portions and wrap each one. Freeze for up to 3 months. Thaw overnight in the refrigerator before reheating.

Best Ways to Reheat Egg Vegetable Casserole

For the best texture, reheat in a 350°F oven for 10-15 minutes, until warmed through. The microwave works in a pinch, heat individual slices in 30-second bursts. A skillet over medium heat also works, especially if you want the edges a little crispy.

Egg Vegetable Casserole FAQs