通心粉和奶酪

成分

• 12盎司美国丽人^® 肘部通心粉
• 3 Tbsp butter, softened
• 3 Tbsp all purpose flour
• 2 1/2 cups milk
• 1/2 tsp. salt
• 1/8 tsp. ground black pepper
• 1/4 cup minced onion
• 2 cups shredded cheddar cheese
• 1/4 cup bread crumbs