Step 1

In a small mixing bowl add drained tuna, diced celery, mayonnaise and mustard. Stir to combine.

Step 2

Add baby spinach to the center of the tortilla. Top spinach with tuna mixture and shredded cheese.

Step 3

Fold the tortilla up and over the tuna filling.  Then make two folds on either side of the tortilla and finally fold over the top.

Step 4

Heat a lightly oiled skillet over medium-low heat. Add the folded tortilla and cook on each side for 3-4 minutes or until cheese is melted.

Step 5

Repeat with remaining tortilla.