Preheat your oven to 350ºF. Mix spaghetti with one jar of tomato sauce and set aside.
In small bowl combine chili powder, cumin, cayenne, and crushed red pepper. Set aside.
Heat a large skillet over medium heat and add the oil. Sauté onion, green pepper, and garlic until soft, about 5 minutes. Add sausage and half of of seasoning mix and cook until no pink remains. Drain well and add remaining tomato sauce to skillet and stir.
In a medium bowl mix together ricotta, cream cheese, sour cream, 1 cup of mozzarella, and remaining seasoning mix. Set aside.
Spray a 13x9-inch pan with cooking spray and spread half of the spaghetti mixture in the pan. Add half of the cheese mixture and spoon it evenly over the spaghetti. Repeat with remaining spaghetti and cheese mixture. Top with meat sauce and ending with the remaining shredded mozzarella.
Bake until cheese is melted and the dish is heated through, about 35 minutes.