Step 1

Preheat oven to 400 degrees F. Cook pasta according to package directions. Drain; set aside.

Step 2

Meanwhile, heat oil in a 12-inch cast-iron skillet over high heat. Add turkey; cook, stirring to crumble, until lightly browned, 4 to 5 minutes. Add cauliflower, bell peppers, onions, carrots and garlic; cook, stirring often, until the vegetables are softened, 5 to 7 minutes. Add tomato sauce, brown sugar, Worcestershire, mustard, salt and pepper. Bring to a boil over medium-high heat. Reduce heat to medium; simmer, stirring occasionally, for 2 minutes.

Step 3

Stir the cooked pasta into the turkey mixture; sprinkle evenly with cheese. Bake until the cheese is melted, 5 to 7 minutes.