Creamy Tuna Mornay with Cauliflower Puree

By AislePrompt Editorial · Published 2026-04-05 · Updated 2026-04-05

A healthier twist on tuna melt with a smooth cauliflower-based cheese sauce, hiding veggies in a comforting, kid-approved dish. This American-inspired kid-friendly recipe, ready in about 25 minutes, pairs canned tuna, cauliflower, low-sodium chicken broth for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 340 calories and feeds 2, so it slots cleanly into a weekly meal plan and pairs well with a quick salad or grain on the side. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

Ingredients

• 1 can (5 oz), drained canned tuna
• 1 cup, steamed and blended into a smooth puree cauliflower
• 1/2 cup low-sodium chicken broth
• 3/4 cup shredded cheddar cheese
• 2 tbsp all-purpose flour
• 1/2 cup milk
• 1 tbsp butter
• 1/4 tsp salt
• 1/8 tsp black pepper

Instructions

1. Step 1: In a saucepan over medium heat, melt 1 tbsp butter. Whisk in 2 tbsp all-purpose flour and cook for 1 minute until golden, then gradually add 1/2 cup milk and 1/2 cup chicken broth while stirring constantly.
2. Step 2: Add 1 cup cauliflower puree, 3/4 cup shredded cheddar cheese, 1/4 tsp salt, and 1/8 tsp black pepper to the saucepan; stir until the cheese melts and the sauce thickens to coat the back of a spoon, about 5 minutes.
3. Step 3: Fold 5 oz drained canned tuna into the cheese sauce until evenly distributed.
4. Step 4: Serve warm, with the sauce thick enough to cling to a spoon and the tuna fully coated.