Johnsonville Italian Sausage, Onions & Peppers Skillet

Ingredients

• 1 package frozen Johnsonville® Mild Italian Sausage slices
• 1 medium green pepper, thinly sliced
• 1 medium red pepper, thinly sliced
• 2 garlic cloves, minced
• 1 tablespoon olive oil
• 1 can (14.5 ounces) diced tomatoes with basil, garlic and oregano
• 1/4 teaspoon red pepper flakes
• Hoagie or sub rolls, optional
• 1 medium onion, thinly sliced