Loaded Baked Cauliflower Casserole

This loaded baked cauliflower casserole brings together eggs, cheese and roasted vegetables in a delightful vegetarian dish that’s great for any meal!

Loaded Baked Cauliflower Casserole

Loaded Baked Cauliflower Casserole

Course Breakfast, brunch, Main Course
Servings 6
Calories 395 kcal


  • 1 red onion, thinly sliced, divided
  • 1 head cauliflower, cut into florets (6-8 cups)
  • 3 medium tomatoes, chopped
  • ¼ cup olive oil
  • 7 eggs
  • 1 tbsp sesame oil
  • 1 tsp cumin
  • ½ tsp dried rosemary
  • tsp dried basil
  • tsp turmeric
  • 1 tsp salt
  • 1 tsp black pepper
  • 1 cup flour*
  • tsp baking powder*
  • ¾ cup parmesan cheese, grated
  • ¾ cup sharp cheddar cheese, grated


  • Preheat the oven to 400℉.
  • Set aside 4 onion rounds and put the rest in a 13” x 9” baking pan.  Add cauliflower and tomatoes.  Toss with olive oil. 
  • Roast in the oven until cauliflower is very tender, 30-40 minutes, turning every 15 minutes. Remove from the oven and allow to cool completely.
  • Whisk together eggs, sesame oil, cumin, rosemary, basil, turmeric, salt and pepper.
  • Blend flour and baking powder and whisk into egg mixture.  Whisk in cheese. Gently fold in vegetables trying not to break up cauliflower.
  • Place mixture in a greased 13” x 9” pan lined with parchment paper.  Arrange reserved onion rings over the top.
  • Bake in 400℉ oven until a knife inserted in the center comes out clean, about 25 minutes.  Allow to rest for 20 minutes before slicing.
  • This dish can be served warm or at room temperature.
  • *Make this dish gluten-free by substituting ¾ cup almond flour for the all-purpose flour.  Increase the baking powder to 1¾ tsp.
  • Hack:  Leftover portions can be stored in the refrigerator for up to 5 days or frozen for upto 3 months.
  • Hack: Frozen cauliflower can be used in this recipe.
Keyword baked, breakfast, brunch, casserole, cauliflower, easy, eggs, gluten-free, oven roasted vegetables, quiche, vegetarian

Did you know?  Cauliflower is part of the cruciferous collection of vegetables that are associated with lowering the risk of some types of cancer.

Suggestion:  Serve this with some crispy hash browns to make a complete meal!

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