Bison Pepperoni Macaroni

Ingredients

• 2 cups dried elbow macaroni
• 1/2 cup chopped green pepper or frozen peas
• 2 tablespoons butter
• 1/3 cup finely chopped onion
• 2 tablespoons all-purpose flour
• 1/4 teaspoon salt or to taste
• 1/8 teaspoon black pepper
• 2 cups milk
• 1 1/2 cups shredded American and Cheddar cheese blend
• 1 cup shredded part-skim mozzarella cheese
• 4 ounces bison sausage with pepperoni seasoning, chopped