Combine Ingredients: In a bowl of moderate size, combine 1/2 cup of Dijon mustard to create a sharp foundation, 1/2 cup of honey for a touch of sweetness, 1/4 cup of mayonnaise to add smoothness, and 2 teaspoons of lemon juice for a bright, acidic note. Whisk these ingredients together thoroughly. This mixture serves as both a flavorful marinade and a tenderizing agent for the chicken.
Marinate the Chicken: Lay the chicken breasts flat in a large zip-lock bag. Flatten them to an even thickness using a meat mallet—this helps the chicken cook uniformly and absorb the marinade better. Drench the chicken pieces thoroughly with the marinade, making sure each portion is completely covered. Seal the bag, remove as much air as possible, and refrigerate. For optimal flavor, marinate for at least 1 hour, though overnight is best for maximum absorption and richness.
Prepare the Additions: While the chicken marinates, prepare your beef/Turkey bacon and mushrooms. Cook the beef/Turkey bacon until crisp and set aside. For the mushrooms, sauté them in butter seasoned with salt and pepper until golden brown; these will add a savory umami flavor to the dish.
Searing the Chicken: Heat a tablespoon of olive oil in a large oven-safe skillet over medium heat. Remove the chicken from the marinade (discard the leftover marinade) and sear each side for about 5 minutes or until golden brown. The searing process helps lock in the juices, making the chicken moist and tender.
Assemble and Bake: Return the sautéed mushrooms to the skillet and place them over the chicken. Add the cooked beef/Turkey bacon, evenly distributing it along with a generous amount of shredded Colby-Jack cheese over the top. Bake in a preheated oven at 400°F for about 10 minutes, or until the cheese is melted and bubbly and the chicken’s internal temperature reaches 165°F.