Preheat oven to 400°F.
Melt butter over medium heat in a small skillet; swirl with garlic for 2 minutes. Pour butter and garlic over breadcrumbs and cool. Toss with cheese and fresh herbs.
Drizzle chicken with EVOO and season both sides with salt and pepper. Slather each piece of chicken with mustard and press that side into the breadcrumb-and-cheese mixture. Arrange chicken on nonstick or parchment-lined baking sheet and bake 20 minutes or until juices run clear and breadcrumbs are deeply golden.