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Dairy-Free Breakfast Casserole: Allergy-Friendly & Delicious - A Cozy Make-Ahead Favorite

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Prep Time 20 minutes
Cook Time 45 minutes
Total Time 1 hour 5 minutes
Servings 8 servings

Ingredients
  

  • 12 large eggs
  • 2 cups breakfast potatoes or hash browns (frozen, thawed; or diced cooked potatoes)
  • 1 pound dairy-free breakfast sausage (or ground turkey/chicken; check labels for dairy)
  • 1 medium onion, diced
  • 1 red bell pepper, diced (any color works)
  • 2 cups baby spinach, roughly chopped
  • 3 tablespoons nutritional yeast (optional, for cheesy flavor)
  • 1 teaspoon Dijon mustard
  • 1 teaspoon garlic powder
  • 1 teaspoon smoked paprika (or sweet paprika)
  • 1 teaspoon kosher salt (plus more to taste)
  • 1/2 teaspoon black pepper
  • 2 tablespoons olive oil (or avocado oil)
  • Optional toppings: sliced green onions, chopped parsley, hot sauce

Instructions
 

  • Prep the oven and pan: Heat oven to 375°F (190°C). Grease a 9x13-inch baking dish with oil or line with parchment.
  • Cook the sausage: Warm 1 tablespoon oil in a large skillet over medium heat. Add sausage and cook, breaking it up, until browned and cooked through. Transfer to a plate.
  • Sauté the veggies: In the same skillet, add the remaining oil, onion, and bell pepper. Cook 4–5 minutes until softened. Stir in spinach and cook 1–2 minutes until wilted. Season lightly with salt and pepper.
  • Layer the base: Spread potatoes evenly in the baking dish. Top with cooked sausage and the sautéed veggies. Distribute everything so each bite has a little of each component.
  • Whisk the egg mixture: In a large bowl, whisk eggs, dairy-free milk, nutritional yeast, Dijon, garlic powder, paprika, salt, and pepper until smooth and well combined.
  • Combine and set: Pour the egg mixture over the layered ingredients. Gently shake the dish or use a spatula to make sure liquid reaches all corners.
  • Bake: Place on the center rack and bake 35–45 minutes, until the top is set and slightly golden and the center no longer jiggles. A knife inserted near the center should come out mostly clean.
  • Rest and serve: Let it stand 10 minutes to firm up. Slice into squares and garnish with green onions, parsley, or hot sauce.