Skillet Caprese Chicken Casserole for Two

Combine pasta, chicken, tomatoes and 2 tablespoons basil in a medium ovenproof skillet. Whisk broth, milk, sour cream, flour, onion powder, dry mustard, salt and pepper together in a measuring cup. Pour over the pasta mixture. Bring to a simmer over medium-high heat. Reduce heat to maintain a simmer, cover and cook, stirring twice, until the pasta is tender and the chicken is cooked through, 14 to 16 minutes.

Meanwhile, position rack in upper third of oven; preheat broiler to high. When the casserole is done, sprinkle cheese on top and broil until the cheese is melted and lightly browned, 2 to 3 minutes. Serve topped with the remaining 2 tablespoons basil and a drizzle of vinegar, if desired.