Marinate the chicken by mixing honey mustard, dijon mustard, vegetable oil, salt, and pepper.
Let it sit in the fridge for at least 2 hours.
Preheat your oven to 350°F.
In a skillet, cook bacon until crispy, then remove and set aside.
In the same skillet, sauté sliced mushrooms in bacon drippings until tender.
Set them aside with bacon.
In an oven-safe pan, sear the marinated chicken breasts on each side until golden brown.
Arrange cooked bacon, mushrooms, and cheese on top.
Bake the assembled chicken in the oven until the cheese is melted and bubbly, about 15-20 minutes.
Sprinkle with parsley before serving.