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 generously with seasoned salt and black pepper.
04 - Heat olive oil in a large skillet over medium-high heat. Sear chicken breasts for 2–3 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 over medium heat. 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 cheeses evenly over each breast. Bake uncovered for 10–15 minutes until cheese is melted and chicken reaches an internal temperature of 165°F (74°C).
08 - Garnish with chopped fresh parsley and serve immediately.