Mac & Cheese With Veggies

Ingredients

• 16 ounces elbow macaroni, cooked al dente
• 1 large onion, finely chopped
• 1 green pepper, chopped
• 2 stalks celery, chopped
• 1 (4 ounce) can green chilies, drained
• 12 cup butter
• 6 tablespoons all-purpose flour
• 2 cups heavy whipping cream
• 1 cup sour cream
• 4 cups cheddar cheese, shredded (or you can use a combo of different cheeses)
• 1 12 teaspoons dry mustard
• 12 teaspoon salt
• 12 teaspoon white pepper
• 12 teaspoon white pepper