Garden Tuna Melts

1 can (6 oz.) tuna in water, drained, flaked
7 Tbsp. KRAFT Real Mayo Mayonnaise, divided
1/4 cup chopped onion
1/4 cup chopped green pepper
1/2 tsp. dried basil leaves
1/2 tsp. dried oregano leaves
8 slices bread
4 KRAFT Singles
Make It
MIX tuna, 3 Tbsp. of the mayo, onion, green pepper and seasonings.
COVER each of 4 bread slices with tuna mixture, 1 Singles and second bread slice. Spread outsides of each sandwich with 1 Tbsp. mayo.
COOK in skillet on medium heat until lightly browned on both sides.