This one is for the bright, sunny mornings. For when you want something satisfying but that doesn’t sit heavy in your stomach. My veggie breakfast casserole is a celebration of produce, and it’s the one I turn to most often for a healthy-ish start to the week. It’s packed with color and texture, and the combination of sweet cherry tomatoes and salty feta is a pairing I will never, ever tire of. It feels a little fancier than the others, somehow. Like you really have your life together, even if you’re just eating it in your pajamas while answering work emails.
Quick Look
| Prep | Cook | Total | Feeds | Level |
|---|---|---|---|---|
| 25 mins | 45 mins | 1 hr 10 mins | 6 | Easy |
Why You’ll Love This Recipe
- It’s Vibrant and Fresh: Bursting with colorful vegetables, it’s as beautiful as it is delicious.
- Naturally Vegetarian: A total crowd-pleaser that doesn’t rely on meat for its flavor.
- The Feta Makes It: Using briny feta cheese means pockets of salty, tangy goodness in every bite.
- It’s Light Yet Satisfying: You’ll feel energized after eating it, not ready for a nap.
Grab These
- For the Veggie Saute:
- 1 tbsp olive oil
- 1 small red onion, chopped
- 1 red bell pepper, chopped
- 1 cup sliced cremini or baby bella mushrooms
- 2 cups fresh broccoli florets, chopped small
- 2 cloves garlic, minced
- 1 cup cherry tomatoes, halved
- For the Assembly:
- 6 large eggs
- 1 cup whole milk
- ½ cup plain Greek yogurt (full-fat for creaminess)
- ½ cup shredded mozzarella cheese (for that stretchy pull)
- ¾ cup crumbled feta cheese, divided
- 1 tsp dried oregano
- ¾ tsp kosher salt
- ½ tsp black pepper
- Fresh basil or chives for garnish
Let’s Make It
This casserole is all about treating the vegetables right. We’re not just dumping them in raw; we’re giving them a quick sauté to drive off excess moisture and concentrate their flavor. Nothing worse than a watery veggie casserole.
So, heat the olive oil in a large skillet over medium heat. Add the red onion, bell pepper, and broccoli. Sauté for 5-6 minutes until the broccoli is bright green and starting to tenderize. Now, add the mushrooms. Mushrooms are little sponges, so we add them after the harder veggies have had a head start. Cook for another 4-5 minutes until the mushrooms have softened and released their water. In the last minute, add the minced garlic and stir until fragrant—about 30 seconds. You’ll smell it. Take the skillet off the heat and stir in the halved cherry tomatoes. We’re just wilting them slightly here.
While the veggie mix is cooling slightly, let’s make the custard. This one is a bit different and so, so good. In a medium bowl, whisk the eggs, milk, and Greek yogurt until smooth. The yogurt adds a wonderful tang and richness without being too heavy. Whisk in the dried oregano, salt, and pepper. Now, stir in the shredded mozzarella and a half cup of the crumbled feta. We’re saving the rest for the top.
Pour the veggie mixture into your greased 9×9 inch or 10-inch round baking dish. Spread it out evenly. Then, pour the egg, cheese, and yogurt mixture over the top. Grab a spoon and gently press the veggies down to ensure they’re mostly submerged. Now, artfully scatter the remaining ¼ cup of feta over the top. This will create those beautiful, browned, salty pockets on the surface.
Bake at 375°F (190°C) for 40-50 minutes. You’re looking for a beautifully risen, golden-brown top and a center that is just set. A knife inserted in the middle should come out clean. Let it rest for 5-10 minutes—this helps the custard set fully. Sprinkle with a handful of fresh, chopped basil or chives right before serving. That fresh herb finish makes all the difference.
Nutritional Facts (Per Serving)
| Nutrient | Amount |
|---|---|
| Calories | ~ 280 kcal |
| Protein | 18g |
| Carbohydrates | 12g |
| Fat | 18g |
| Fiber | 2g |
| Sugar | 7g |
| Note: Values are estimates |
Variations & Add-Ins
- Mediterranean Magic: Swap the broccoli for ½ cup of chopped artichoke hearts and add ¼ cup of sliced Kalamata olives with the tomatoes.
- Everything But The Bagel: Use 1 tablespoon of Everything Bagel Seasoning in the custard instead of the oregano and salt. So good.
- Creamy Goat Cheese: Swap the feta for an equal amount of crumbled goat cheese for a even tangier, creamier experience.
Serving Ideas
I love this with a simple side of sliced avocado and a extra sprinkle of flaky sea salt. A drizzle of hot honey is also a revelation here. For a more substantial meal, it’s wonderful with a few slices of buttered sourdough toast.
Storage & Reheating
Best eaten within 3 days. Reheat gently in the oven or toaster oven to preserve the texture. The microwave can make it a bit soft.
My Two Cents
Don’t skip the step of sautéing the harder veggies (broccoli, peppers) first. It concentrates their flavor and removes excess water, which is the #1 cause of a soupy, disappointing veggie casserole. It’s a little extra step for a massive payoff.
You Asked, I’m Answering
Can I use frozen vegetables?
You can, but you must thaw and thoroughly drain them first. I’d even pat them dry with a paper towel. If you add them frozen, they’ll release way too much water and make the casserole soggy.
Is the Greek yogurt necessary?
It adds a fantastic tang and creaminess. If you must, you can substitute it with an additional ½ cup of milk, but you’ll lose that signature zip and rich texture.
Can I add spinach?
Absolutely! Just stir in a couple of large handfuls of fresh spinach at the very end of sautéing your veggies. It will wilt down perfectly.