Preheat oven to 400°F
Spray pan with PAM Cooking Spray and set aside.
Slice grooves into the chicken being sure not to cut all the way through to the cutting board.
Drain the liquid from the RO*TEL and place in a bowl. Mix 1 cup of shredded cheese with the tomatoes.
Spoon mixture into the grooves of the chicken.
Place chicken in pan and cover with remaining cheese, or more if your heart desires.
Bake for 30-40 minutes until chicken is cooked.