Spray a pan with cooking spray and cook peppers and onions over medium heat until the red peppers and onions soften and the mixture starts to brown.
While the pepper/onion mixture is cooking, start cooking your sausage. For the sausage to fit well on the roll, I cut it in half and spread it out in a pan. This also helped reduce the cooking time. Brown the sausage until no more pink remains and it is fully cooked. While this is cooking preheat a broiler.
Spread the pesto sauce on both sides of the sliced bun.
Top with the cooked sausage and pile on the banana peppers, red peppers and onions. Cover with ¼ cup of shredded mozzarella cheese and toast in a broiler or oven 5-10 minutes until cheese melts and bread starts to brown.
Calories: 738kcal | Carbohydrates: 31g | Protein: 29g | Fat: 55g | Saturated Fat: 19g | Polyunsaturated Fat: 5g | Monounsaturated Fat: 19g | Cholesterol: 110mg | Sodium: 1529mg | Potassium: 590mg | Fiber: 4g | Sugar: 5g | Vitamin A: 3232IU | Vitamin C: 123mg | Calcium: 259mg | Iron: 3mg