Shepherd's Pie

Brown ground beef in large skillet over medium-high heat, stirring occasionally. Stir in onion, celery, carrot and garlic and cook, stirring occasionally, until vegetables are crisp-tender, about 5 minutes.

Cover potatoes with water in 2-quart saucepot; bring to a boil over high heat. Reduce heat and simmer 10 minutes or until potatoes are tender; drain. Return potatoes to saucepot, then add Hellmann's® or Best Foods® Real Mayonnaise and milk. Mash potatoes until smooth and creamy. Season, if desired, with salt and ground black pepper and set aside.

Stir flour into beef mixture and cook over medium heat, stirring frequently, 30 seconds. Stir in tomato paste, water and crumbled Knorr® Beef flavored Bouillon Cube and bring to a boil over high heat. Reduce heat, cover and simmer, stirring occasionally, 5 minutes or until mixture thickens slightly and vegetables are tender.

Spoon beef mixture into 2-quart shallow oven-proof casserole, then evenly spread the top with mashed potatoes. Sprinkle, if desired with shredded cheddar cheese. Broil until lightly golden and cheese is melted, about 3 minutes.