Ingredients:

  • 5 oz (142g) canned tuna in water, drained
  • 1 tbsp (15g) mayonnaise
  • 1 tsp (5g) Dijon mustard
  • 1 tbsp (15g) finely diced celery
  • 1 tbsp (15g) finely diced red onion
  • 0.5g salt
  • 0.5g black pepper
  • 1 piece (50g) low-carb pita or keto-friendly bread
  • 2 slices (40g) sharp cheddar cheese
  • 1 tsp (5g) melted butter

Instructions:

  1. In a small bowl, flake the 5 oz (142g) drained tuna with a fork.
  2. Stir in the 1 tbsp (15g) mayonnaise, 1 tsp (5g) Dijon mustard, 1 tbsp (15g) diced celery, and 1 tbsp (15g) diced red onion until the mixture is creamy and well-combined.
  3. Season the tuna mixture with 0.5g salt and 0.5g black pepper to taste.
  4. Brush the outer side of the 50g low-carb bread with 1 tsp (5g) melted butter.
  5. Place one slice (20g) of sharp cheddar cheese directly on the bread to create a moisture barrier.
  6. Scoop the tuna mixture evenly over the cheese slice.
  7. Top the tuna with the second slice (20g) of sharp cheddar cheese.
  8. Place the open-faced melt in the air fryer basket.
  9. Cook at 375°F (190°C) for 6–8 minutes, or until the cheese is bubbling and mahogany-colored and the edges of the bread are crisp and toasted.