Paninis are a favorite around here, though I confess that I forget about them from time to time. One of our favorites is like so:
Chicken cut into bite size pieces
(if it isn't already cooked, cook it with pesto sauce)
Basil pesto sauce -- mix with cooked chicken -- a tablespoon or two.
Sliced red bell peppers
Grated monterrey jack cheese
Sliced sourdough bread
It helps to soften the red bell peppers (cook with chicken) but not necessary.
Mix chicken with pesto, put on bread with bell peppers and cheese and grill like a panini. Simple, yummy.