Low Carb Easy Cheesy Tuna Casserole

Low Carb Easy Cheesy Tuna Casserole
April 3, 2020 Rachel Tirabassi

This creamy, cheesy tuna casserole is packed with extra veggies, and ready in just 30 minutes!

Course: Dinner
Cuisine: American

Prep Time: 30 minutes
Cook Time: 5 minutes
Servings: 4 portions


  • 1/2 pound short cut pasta such as Barilla Plus Farfalle
  • 1 head cauliflower
  • 2 tablespoons olive oil
  • 1 cup diced onion
  • 1 jar prepared alfredo sauce
  • 2/3 cup milk
  • 2 1/2 cups grated cheddar cheese divided
  • 2 cans water packed tuna
  • salt & pepper to taste
  • 1 cup frozen peas


  • Bring large pot of water to boil. Cut cauliflower into small bite-sized florets. Once water comes to rolling boil, salt water and stir in pasta. Cook 3 minutes and then pour in cauliflower pieces. Cook until pasta is al dente and cauliflower is soft. Drain and set aside.
  • In same pot over medium heat, saute onion in olive oil until soft, 5 minutes. Sprinkle in salt and pepper. Pour in alfredo sauce. Pour milk into jar of alfredo sauce, replace lid and shake to remove any excess. Uncap and pour into pot. Sprinkle 2 cups of cheese into sauce and stir until cheese has melted and sauce is smooth.
  • Pour in cooked pasta, cauliflower and frozen peas. Stir until everything is well mixed and coated in sauce. Splash in a little milk if sauce seems to thick. Smooth the top and sprinkle with remaining 1/2 cup cheese.
  • Remove from heat and cover to melt cheese OR stick pot under hot broiler for 1-2 minutes or until cheese is brown and bubbly. Serve hot.