In a small bowl, whisk together the mayonnaise, mustard, honey, vinegar, and pepper.
Pour mixture over chicken and spread to cover the chicken.
Cover and cook on low for 4 hours. The chicken is done when it easily shreds apart with a fork.
Shred chicken with forks when cooked through. Stir the mixture well to coat the chicken in the sauce.
Spoon chicken into sandwich rolls, top with cheese and bacon. Serve hot.
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Notes
Chicken: We prefer chicken breasts, but chicken thighs will also work fine.Honey Mustard: Make this even easier by using 3/4 cup of store bought honey mustard. We really love our homemade honey mustard though! Drizzle a little extra on top of the finished sandwich if you like.Sandwiches: We like to put the cheese over the hot chicken to give it a chance to melt a bit. Letting the cheese come to room temp helps it melt quicker or you can pop the open faced sandwiches in a warm oven for a minute or two to help the process along. Highly recommend buttering and toasting the buns for the texture you get. Bacon: We put one slice of bacon per sandwich (broken in half) but feel free to add as much bacon as your heart desires!