Step 1

Preheat the oven to 350°F.

Step 2

Bring a large pot of salted water to a boil, add the pasta, and cook until al dente. Drain and reserve.

Step 3

Meanwhile, in a 12-inch ovenproof skillet, heat the olive oil over medium-high heat. Add the onion and garlic and sauté, stirring, for 1 minute until fragrant. Add the turkey and steak seasoning. Cook, stirring frequently, until the turkey is browned on the edges (the turkey may not be completely cooked but will finish in the oven). Drain any accumulated juices.

Step 4

Add the canned diced tomatoes, tomato paste, mustard, and relish, reduce the heat to medium, and stir until bubbling. Remove from the heat and stir in the drained pasta. Smooth the top. Cover the top of the casserole with the cheese slices, cutting as necessary to fit. Bake for 20 to 25 minutes until the cheese is melted and the mixture bubbles. Garnish with diced tomatoes, sprinkle with salt and pepper, and serve.