Mix the tuna filling

• In a bowl, combine the tuna, mayonnaise, tomato puree and red onion.
• Stir until evenly mixed.

Fill the wrap

• Place a wrap in a pan with a spray of oil over a medium heat.
• Spread half of the tuna mixture over half of the wrap.
• Add a layer of spinach and half of the cheese.

Fold and cook

• Fold the wrap over and cook until golden.
• Flip and cook the other side until golden and the cheese has melted.