01 - Preheat oven to 375°F (190°C).
02 - In a small mixing bowl, whisk together Dijon mustard, honey, mayonnaise, and lemon juice 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 but not fully cooked through. Transfer to a baking dish.
05 - In the same skillet, cook bacon slices until crispy. Remove and drain on paper towels. Crumble or leave whole for topping.
06 - Melt butter in the same skillet. Add sliced mushrooms and sauté until golden brown and tender, approximately 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. Bake uncovered for 10 to 15 minutes until cheese is melted and chicken reaches an internal temperature of 165°F (74°C).
08 - Remove from oven, garnish with fresh chopped parsley, and serve immediately.