Whip up this traditional British side as an accompanient to turkey or roast beef. The pudding, which is similar to a popover, is ideal for mopping up gravy.

Completely reinvent your leftovers: Fold pieces of leftover pecan pie into a bread pudding made from leftover dinner rolls and bake until golden brown.

Thanks to leftover roast beef, these toasty sandwiches come together in just 20 minutes.

Welsh rarebit is toast with a savory cheese sauce served over the top. Alton's is made with beer-spiked cheddar; serve it over rye toast and you've got yourself a uniquely British snack.

Grandma knew how to make a hearty meal out of leftovers. This recipe is meant for riffing, so use any type of cheese, veggies, meat or bread you have on hand.

This recipe calls for ham, turkey and eggnog — and we're willing to bet you have almost everything you need on hand. Assemble these sandwiches after the Christmas celebration, then simply unwrap and cook just before the guests arrive for Boxing Day.

Hold on to your roasted turkey leftovers — including the bones to make stock — and make this spicy Mexican-inspired soup on Boxing Day.

Patricia whips up a simple dough for the popovers, then tops them with leftover roast beef and horseradish. Serve these as a crowd-pleasing app, or include them in a Boxing Day buffet.

Need an impressive throw-together dish? Combine leftover turkey with egg noodles, spinach and mushrooms, then toss with a simple cream sauce.

Hosting Boxing Day brunch? Serve Ree's mini casseroles. With the help of leftover Christmas ham, these super-easy egg muffins are ready in less than an hour.

Your Boxing Day menu needs this soup. Using leftover ham and veggies, it's simple enough to serve as an app or with sandwiches. But, if you're still stuffed from Christmas, it can also stand as a complete meal.

A combo of Dijon mustard, horseradish and gravy makes this sandwich extra flavorful.

Liven up your leftover turkey with a tasty quiche. Fresh dill and scallion add bright pops of green to this egg dish.

Ground beef and lamb form the base of this traditional British casserole, which is topped with mashed potatoes and grated cheddar.