On a large board or platter, place the dip in the center of the board. Arrange the vegetables around it.
For the next layer, place the potato chips and Fritos.
For tuna mixture, empty drained tuna into a large bowl. Mix with a fork, adding the mayonnaise and grated red onion.
Heat the dinner rolls according to package directions.
Slice (but not completely through), and add 2 Tbsp. tuna mixture.
Place cheese on top, and place the top of the roll back over the cheese. Place all the rolls in a baking pan and cover with foil.
Bake the rolls at 350 degrees for additional 10-15 minutes, until the cheese is melted. Remove foil.
Add a thick slick of tomato, iceberg lettuce chunk, and 2 pickles. After assembled, place a “skewer” or long appetizer toothpick in the center. Place the 24 tuna melts around the outside of the board. SERVE!