One Skillet Mac & Cheese with Sausage and Belle Peppers

40min · 5 servings 1 lb fusilli pasta Water olive oil Salt 1 cup chopped green bell peppers 1 cup chopped red bell peppers ½ cup chopped red onions 1 tablespoon chopped garlic (or 3-4 garlic cloves) 1 lb sweet Italian sausage (Or chicken sausage), casings removed 2 tablespoon tomato paste ½ teaspoon sugar 1 ½ cups shredded mild cheddar cheese 2 ½ cups shredded mozzerlla cheese