What You’ll Learn in This Recipe

• How to prepare a make-ahead veggie breakfast casserole

• What makes this casserole fiber-rich and high in protein

• How just better.® prebiotic fiber fits into savory baked dishes

JBB Recipe of the Week:
Make-Ahead Veggie Breakfast Casserole

Our make-ahead veggie breakfast casserole is a fiber-rich, protein-packed option that is perfect for breakfast, take-to-work lunches, or simple dinners. 

Baked in a single dish, it’s simple to prepare ahead of time and stores well for meals that need to be ready without extra effort during the week. 

Ingredient Highlight

Crimini or White Mushrooms: Mushrooms provide savory depth along with B vitamins and minerals that support energy metabolism. Sautéing them separately helps retain their structure and flavor while preventing excess moisture in the finished casserole.

Shallot: Shallots offer a mild allium flavor and natural antioxidants. Their softer profile complements egg-based dishes without overpowering other vegetables.

Red & Green Bell Peppers: Bell peppers add fiber, vitamin C, and natural sweetness. Using both red and green peppers brings color, texture, and a mix of subtle flavor notes to the casserole.

Cherry Tomatoes: Cherry tomatoes contribute brightness, moisture, and lycopene. Adding them after other vegetables soften helps preserve their shape and prevents the casserole from becoming watery.

Eggs: Eggs provide high-quality protein and fats that anchor this dish. Including protein at meals supports satiety and helps moderate post-meal blood sugar spikes and crashes.

Cottage Cheese: Cottage cheese adds additional protein and calcium while creating a creamy egg base. It helps the casserole bake up tender and satisfying without relying on heavy dairy.

just better.® prebiotic fiber: Prebiotic fiber helps slow carbohydrate digestion and supports a more gradual blood sugar response when taken with meals and snacks. just better.® fiber dissolves easily into the egg mixture, making it simple to include in savory baked dishes. 

With these ingredients prepped and ready, here’s how to bring this breakfast casserole together. 

 

Make-Ahead Veggie Breakfast Casserole

Yield: 4–6 servings

Ingredients

1 tablespoon avocado oil, plus more as needed

6 ounces crimini or white mushrooms, sliced

1 medium shallot, finely chopped

½ cup red bell pepper, chopped

½ cup green bell pepper, chopped

½ cup cherry tomatoes, halved

8 large eggs

½ cup small-curd cottage cheese

⅓ cup milk

¼ cup just better.® prebiotic fiber

1 cup shredded cheddar cheese

½ teaspoon salt

1 teaspoon garlic powder

¼ teaspoon crushed red pepper (optional)

2 tablespoons sliced green onions, for topping

Directions

Preheat the oven to 350°F. Lightly oil an 8-inch square baking dish.

Heat a drizzle of avocado oil in a skillet over medium-high heat. Add the sliced mushrooms and cook until browned and most of the moisture has been released. Remove from the pan and set aside.

In the same skillet, add a little more olive oil if needed. Sauté the shallot until softened and fragrant. Add the red and green bell peppers and cook until just tender.

Stir in the cherry tomatoes and cook briefly, just until warmed and slightly softened. Remove from heat and let the vegetable mixture cool slightly.

In a large bowl, whisk together the eggs, cottage cheese, milk, just better.® prebiotic fiber, salt, garlic powder, and crushed red pepper.

Fold the sautéed vegetables into the egg mixture, then gently stir in the reserved mushrooms and shredded cheddar cheese.

Pour the mixture into the prepared baking dish and spread evenly.

Bake for 35–40 minutes, until the center is set and the top is lightly golden.

Let rest for 5–10 minutes, then finish with sliced green onions before serving.

Serving Notes

This casserole slices cleanly and reheats well, making it a solid option for:

• Make-ahead breakfasts

• Take-to-work lunches

• Quick dinners that don’t require extra prep

Cooking & Baking with just better.®

just better.® prebiotic fiber is a smart choice for recipes like our breakfast casserole because it dissolves completely without changing flavor or texture. Adding just better.® to your go-to recipes is a simple way to instantly upgrade your favorite foods into high-fiber meals! The best part? just better.® prebiotic fiber does not lose potency when prepared in advance. 

Make Ahead Magic

Put this week’s recipe in your make-ahead meal rotation. This breakfast casserole is fiber-rich and high in protein, built around simple, wholesome ingredients. 

Meal prep… just better.®!