Bring a large pot of salted water to a boil and add the penne pasta, cooking according to package directions until al dente (usually around 9-11 minutes). While the pasta cooks, prepare your mise en place: dice the onion into 1/2-inch pieces, seed and cut the bell pepper into 1/2-inch chunks, mince the garlic, and measure out all your spices into a small bowl. Having everything prepped and ready will make the cooking process smooth and allow you to focus on building layers of flavor.

Heat the oil in a large skillet over medium-high heat. Once shimmering, add the diced onion and bell pepper chunks, sautéing for about 5 minutes until they begin to soften and develop a light golden color at the edges. Add the minced garlic in the final minute of cooking, stirring constantly to prevent burning. This technique allows the vegetables to release their natural sweetness and create an aromatic foundation for the entire dish.

Add the ground turkey to the skillet with the sautéed vegetables, breaking it up with a wooden spoon as it cooks. Once the turkey is mostly broken into small pieces and no longer pink (about 5-7 minutes), sprinkle in all your spice blend: chili powder, ground cumin, salt, pepper, red pepper, and Italian seasoning. Stir well to coat the turkey evenly with the spices and cook for another minute to toast them slightly, which intensifies their flavor. I like to use freshly ground spices whenever possible—they make a noticeable difference in the depth of this dish.

Tilt the skillet and use a spoon or paper towel to blot away any excess grease from the cooked turkey mixture, leaving just enough to coat the pan lightly. Reduce the heat to medium-low and add the diced tomatoes with their juice, stirring gently for about 1-2 minutes to combine. The lower heat prevents the sauce from breaking down too quickly and helps it meld with the turkey and spices.

Drain the cooked pasta thoroughly and add it to the skillet with the turkey and tomato sauce. Fold in the fresh spinach using tongs or a spatula, stirring gently for 1-2 minutes until the spinach is just wilted and everything is evenly combined. The residual heat from the sauce will wilt the spinach perfectly while keeping it vibrant. I find that adding the spinach at the very end preserves its nutritional value and bright color.

Transfer the pasta to serving bowls or plates and top generously with freshly grated parmesan cheese. The warmth of the pasta will slightly melt the cheese, creating a creamy finish that brings all the flavors together.