zippy tuna melts

Ingredients For zippy tuna melts

• 6 Tbsp

  mayonnaise
• 2 can

  6oz each solid white tuna, drained
• 1/4 c

  finely chopped celery
• 2

  scallions, finely chopped
• 2 Tbsp

  chopped parsley (i used dried)
• 2 tsp

  apple cider vinegar
• 1 Tbsp

  whole grain mustard
• 1 Tbsp

  prepared horseradish
• 4 slice

  rye bread, lightly toasted
• 4 slice

  lacey swiss cheese (or your choice of cheese)
• 2

  tomatoes, sliced (i used grape tomatoes, what i had)
• salt and pepper to taste