Juicy Baked Chicken Breasts with Mushroom Sauce

Ingredients

• , Chicken breasts (8-10 oz each)
• 3 tsp Kosher salt
• 2 tsp Sweet or smoked paprika
• 1 and 1/2 tsp Garlic powder
• 1 and 1/2 tsp Onion powder
• 1 tsp Black pepper
• 1 tsp Dried Italian seasoning
• as needed Olive oil (for brushing)
• 1/2 tsp Kosher salt (for sauce)
• 1/4 tsp Black pepper (for sauce)
• 4 cups, sliced Cremini mushrooms
• 2 tsp Soy sauce
• 2 tsp Balsamic vinegar
• 1/4 cup Butter (for roux)
• 1/4 cup Flour (for roux)
• about 2 cups Unsalted chicken stock