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Cheesy Cauliflower and Tuna Casserole

Loaded with veggies, creamy tuna , and bubbling cheese, this tuna casserole recipe is a low carb dish the whole family will enjoy!
Total Time 45 mins
Course Main Course
Servings 12
Calories 355 kcal


  • 1/4 c butter
  • 1 onion, diced
  • 2 lg carrots, diced
  • 4 c 1% milk
  • 1 tsp salt
  • 2 tsp honey mustard
  • 1/4 c ground flax
  • 16 oz 4 c sharp cheddar cheese, shredded
  • 2 lbs frozen cauliflower
  • 2 tbsp apple cider vinegar
  • 2 tbsp sugar
  • 24 oz tuna
  • 1/3 c plain nonfat Greek yogurt
  • 1/3 c mayo


  • Melt the butter in a sauce pan. Add the diced carrots and onion and saute for a couple minutes.
  • Add the milk, salt, and honey mustard. Heat until milk comes to a low boil.
  • Remove from the heat and stir in the ground flax, and 2 c cheddar cheese.
  • In a separate bowl, mix the tuna,vinegar, sugar, mayo and Greek yogurt. Spread on top of the cauliflower layer.
  • Pour the sauce over the cauliflower and tuna.
  • Top with the remaining cheese.
  • Bake at 350F for 35 minutes or until cheese is bubbly and brown.


Macros Per Serving: 11g Net Carbs, 23g Fat, 26g Protein
Keyword Gluten Free, Low Carb, Tuna Casserole