This is my sister-in-law's recipe, and although it sounds a little weird, it's actually really good. Nothing has to be exact, so feel free to adjust it. You could even brown the chicken in a pan before baking it to crisp the bacon.
4 boneless, skinless chicken breasts, either pounded flat (or just cheat and buy thin-cut like I do)
1 tart Granny Smith apple, grated
1/4 of a small onion, grated
4 strips bacon or turkey bacon
Preheat oven to 375. Season chicken with salt and pepper. Then place a mound of apple and a little bit of onion on each chicken breast. Roll up, then wrap 1 strip of bacon around each breast. Bake for 30 minutes at 375, then turn on broiler (chicken should be cooked through at this point, so make sure it's no longer pink). Broil chicken for an additional 5 minutes (watch closely) to crisp up bacon.
Serve with your choice of side and vegetable.