Keto Tuna Casserole

Rediscover a beloved comfort food with this Keto Tuna Casserole, a delicious and low-carb alternative to the traditional pasta-laden dish. This version is packed with flavorful tuna, crisp vegetables, and a creamy, cheesy binder, all baked to golden perfection. It’s a quick, easy, and satisfying meal that the whole family will love.

Ingredients & What You’ll Need

• Cans Tuna in Water (2, 5 oz each, drained): The lean protein base for your casserole. Draining well prevents a watery dish.
• Zucchini (1 cup, finely chopped): Adds moisture, bulk, and a mild flavor without excess carbs.
• Celery (1 cup, finely chopped): Provides a pleasant crunch and aromatic notes.
• Red Onion (1 medium, finely chopped): Offers a sharp, fresh flavor that complements the tuna.
• Mayonnaise (⅓ cup): The creamy binder for the casserole, ensuring a rich texture.
• Dijon Mustard (1 tbsp): Adds a tangy, sharp kick that brightens the flavors.
• Mozzarella Cheese (1 cup, shredded): Used both in the mix and for a golden, bubbly topping.
• Sea Salt (½ tsp): Enhances all the flavors in the casserole.
• Black Pepper (¼ tsp): Adds a touch of warmth and spice.
• Fresh Parsley (¼ cup, chopped): For garnish, adding a burst of freshness and color.

How to Make Keto Tuna Casserole

This keto tuna casserole comes together in just a few simple steps, making it perfect for a quick and easy meal.

Preheat Oven and Combine Ingredients

Begin by preheating your oven to 400°F (200°C). While the oven heats, take a large mixing bowl. Add the drained tuna, finely chopped zucchini, finely chopped celery, mayonnaise, Dijon mustard, finely chopped red onion, ½ teaspoon of sea salt, and ¼ teaspoon of black pepper to the bowl. Next, add ¼ cup of the shredded mozzarella cheese to this mixture. Stir all the ingredients together thoroughly until they are well combined and the tuna is evenly coated.

Assemble and Bake

Once the tuna mixture is ready, transfer it into a 1-quart casserole dish, spreading it out evenly. Take the remaining shredded mozzarella cheese and sprinkle it generously over the top of the tuna mixture in the dish. Place the casserole dish into your preheated oven and bake for 15 minutes, or until the cheese on top is golden brown and bubbly.

Garnish and Serve

Carefully remove the Keto Tuna Casserole from the oven. For a final touch of freshness and color, garnish the top with the fresh chopped parsley. Your delicious and low-carb tuna casserole is now ready to enjoy!