01 - Preheat oven to 375°F (190°C).
02 - Whisk together Dijon mustard, honey, mayonnaise, and lemon juice in a small bowl until smooth. Set aside.
03 - Pound chicken breasts slightly to an even thickness. Season both sides 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. Transfer to a baking dish.
05 - In the same skillet, cook bacon slices until crispy. Remove and drain on paper towels. Crumble or keep whole.
06 - Melt butter in the skillet. Add sliced mushrooms and sauté until browned and tender, about 5 minutes.
07 - Brush each chicken breast generously with honey mustard sauce. Layer sautéed mushrooms and bacon on top, then sprinkle both Colby Jack and Monterey Jack cheeses evenly over each breast.
08 - Bake uncovered for 10 to 15 minutes until cheese is melted and bubbling and chicken reaches an internal temperature of 165°F (74°C).
09 - Garnish with chopped fresh parsley and serve immediately.