1 Make the sauce: Heat the olive oil in a large saucepan on medium high heat. Add the garlic and cook until fragrant, about 30 seconds.
Stir in the crushed tomatoes, basil, oregano, sugar, a pinch of salt and pepper. Bring to a simmer.
Continue to simmer until sauce thickens a bit and flavors meld, about 10-12 minutes. Taste sauce, adjust seasoning if necessary, cover and keep warm.
2 Preheat oven to 450°F. Line a baking sheet with foil, parchment, or Silpat. While the sauce is simmering, prepare the chicken in the next steps.
3 Make the coating: In a large bowl whisk together the mustard, vinegar, salt, and 1/4 teaspoon of pepper.
Add the chicken cutlets to the mixture and coat well on both sides.
4 Dredge the chicken: In another bowl, mix together the breadcrumbs, grated Parmesan, and 1/4 teaspoon of black pepper. Mix well and stir in the melted butter. Transfer to a shallow plate.
Dredge the chicken pieces in the breadcrumb mixture, gently pressing the breadcrumbs into the chicken cutlets. Place dredged chicken on the lined baking sheet.
5 Bake: Bake at 450°F on the center rack of the oven until cooked and golden brown, about 15 minutes.
6 Serve: Serve with a side of rice, noodles or pasta. Ladle sauce with the chicken.