Tuna Noodle Casserole

Ingredients (17)

• For the Casserole:
• 4 cups dry wide egg noodles
• 4 tablespoons butter
• 2 celery stalks,
• 1 small red bell pepper,
• 1 small yellow onion,
• 1 clove garlic,
• 2/3 cup all-purpose flour
• 1 teaspoon ground mustard,
• 1/2 teaspoon salt
• 1/4 teaspoon fresh ground black pepper
• 2 1/4 cups milk
• 12 ounces can white tuna in water,
• 4 ounces shredded cheddar cheese
• For the Topping:
• 1 cup finely crushed ritz crackers,
• 4 tablespoons butter,