01 - Preheat oven to 375°F.
02 - Whisk together Dijon mustard, honey, mayonnaise, and lemon juice in a small bowl until smooth and well combined. Set aside.
03 - Pound chicken breasts slightly to an even thickness for uniform cooking. Season both sides generously with seasoned salt and black pepper.
04 - Heat olive oil in a large skillet over medium-high heat. Sear chicken breasts for 2 to 3 minutes per side until golden brown. Chicken will not be fully cooked at this stage. Transfer to a baking dish.
05 - In the same skillet, cook bacon slices until crisp. Remove and drain on paper towels. Crumble or keep whole and set aside.
06 - Melt butter in the same skillet. Add sliced mushrooms and sauté over medium heat until golden brown and tender, about 5 minutes.
07 - Brush each chicken breast generously with the honey mustard sauce. Layer sautéed mushrooms and bacon over each breast, then sprinkle both Colby Jack and Monterey Jack cheeses evenly on top. Bake uncovered for 10 to 15 minutes until cheese is melted and bubbling and chicken reaches an internal temperature of 165°F.
08 - Remove from oven, garnish with fresh chopped parsley, and serve immediately.