Chicken Teriyaki Sandwiches

These were so good. Perfect for summer grilling. As soon as I saw them over at Family Favorite Recipes I knew I had to give em a try, they did not disappoint.

4 chicken breasts
1 bottle Teriyaki sauce (we used Lawry's brand)
3/4 c. brown sugar
4 slices deli ham
1 can sliced pineapple (or you can use fresh which would be even better)
4 slices Pepper Jack cheese
4 large hamburger buns

Pound chicken breasts until they are about 1/4" thick all around. Place in a large Ziploc bag. Combine Teriyaki sauce and brown sugar until sugar dissolves. Add 1/2 of the mixture to the bag with the chicken and seal tightly. Place bag in refrigerator for at least 4-5 hours. Separate remaining Teriyaki mixture into 2 separate bowls (to prevent cross contamination use 2 separate brushes too)-- one for the pineapple, one for the chicken. Open pineapple can and save a little of the juice in a bowl. Place chicken and pineapple on the grill (medium heat). Brush with Teriyaki sauce every few minutes until chicken and pineapple are done-- try to only flip the chicken and pineapple once. Either on the grill or in a frying pan, cook ham with a little of the pineapple juice until it becomes nice and hot. Slice open hamburger buns and place a piece of cooked chicken on each bottom bun. Top with cheese, ham, grilled pineapple, and bun top. Serve immediately with remaining grilled pineapple.