Generously season your chicken breasts with salt and pepper on both sides. Heat the olive oil in a large, deep skillet or pan over medium to medium-high heat. Add the chicken breasts to the pan and cook for about 5 minutes per side, or until juices run clear, turning a nice golden brown. Once cooked, reduce the heat to low and carefully remove chicken from pan and set aside.

Make sure that you have reduced the heat to low, then add the minced garlic to the same pan with the oil. Cook the garlic for 1 minute, then slowly add the crushed tomatoes to the pan, then add the dried basil and cayenne pepper. Slowly increase the heat to bring the sauce to a simmer. Keep the sauce at a simmer so that it does not splatter. Simmer for 5 minutes, stirring occasionally. Whisk in the butter until melted, then whisk in 2 tablespoons of grated parmesan cheese. Carefully return the cooked chicken breasts to the pan and allow them to simmer in the sauce for an additional 3 minutes.

Serve over cooked pasta and garnish with additional parmesan cheese. As an alternative, you could serve it with some bread for dipping in the sauce and a nice side salad. If you would like to keep it low carb and gluten-free, try serving it over zucchini noodles or spaghetti squash.