Whisk together the mayonnaise, mustard, honey, and smoked paprika. Set aside half of the mixture in a small bowl to serve as a dipping sauce later.

Season the chicken breasts with garlic powder and plenty of cracked black pepper. In a large oven-safe skillet, sear the chicken in a tablespoon of oil over medium-high heat for 3–4 minutes per side. You aren't cooking it through yet—you are just building a golden-brown crust.

Remove the skillet from the heat. Brush the tops of the seared chicken generously with the remaining honey mustard glaze.

Layer the sautéed mushrooms over the glaze, followed by the crispy bacon strips (broken in half to fit the chicken). Smother each breast with a generous mound of the shredded cheese blend.

Place the skillet into a preheated oven at 375°F for 10–15 minutes. The chicken will finish cooking gently in the residual heat while the cheese melts into a bubbly, golden blanket.

Garnish with fresh parsley. Serving the chicken with the reserved, chilled honey mustard sauce on the side provides a refreshing temperature contrast.