Mini Philly Cheesesteaks
1 (12 ounce) skirt steak 1 cup cold milk 1 pinch cayenne pepper 1 pinch ground nutmeg 2 baguettes, or as needed, cut into 48 1/2-in… 2 ounces shredded provolone cheese, or more t… 2 tablespoons all-purpose flour, or as needed 2 tablespoons butter, or as needed 3 tablespoons olive oil, divided, or as neede… salt and freshly ground black pepper to taste salt to taste ¼ cup shredded provolone cheese, or as needed ¼ cup water ⅓ cup diced onion ⅓ cup diced sweet peppers