6 Unique Christmas Leftovers Sandwich Ideas

Discover six delicious Boxing Day sandwich ideas using leftover turkey, stuffing, roast potatoes, pigs in blankets and more. Upgrade your Christmas leftovers!

Even though we did our very best — and we mean VERY best — to scoff every last bite of the big Christmas dinner, somehow there are still leftovers lurking in the fridge. And if, like us, you hate the idea of wasting perfectly good festive food, we’ve got six brilliant leftover sandwich ideas the whole family will love (ideal for surprise visitors too!). Don’t worry — we’ve included a tasty veggie option as well!

Six Christmas Leftover Sandwich Ideas

The Ultimate Christmas Crunch Stack

What’s in it: Turkey slices, thinly pan-crisped leftover roast potatoes, shredded sprouts, cranberry sauce, and gravy-mayo.
Veggie swap: Use leftover nut roast, vegetarian turkey slices, or crispy roasted cauliflower.
Why it works: Sweet, savoury, soft, and crunchy all in one perfect stack.

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Pigs-in-Blankets Breakfast Melt

What’s in it: Sliced pigs in blankets, stuffing, fried egg, cheddar, mustard mayo on a brioche bun.
Veggie swap: Use vegetarian pigs in blankets or veggie sausages wrapped in faux bacon.
Why it works: A Boxing Day breakfast you can hold in your hands.

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The Festive Katsu Sando

What’s in it: Breaded leftover turkey, slaw made from leftover veg, cranberry-tonkatsu sauce on soft Japanese milk bread.
Veggie swap: Bread and fry slices of leftover nut roast or breaded tofu.
Why it works: A fun Japanese twist meets Christmas comfort.

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Brie & Brussels Hot Honey Hoagie

What’s in it: Warm brie, sautéed Brussels sprouts, sliced turkey, and hot honey on a toasted baguette.
Veggie swap: Swap turkey for roasted mushrooms, veg stuffing balls, or charred squash slices.
Why it works: Creamy, spicy, sweet, and addictive.

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The Boxing Day Nacho Sub

What’s in it: Chopped turkey, crushed roast potatoes, stuffing crumbs, melted cheese, with gravy dip.
Veggie swap: Use vegetarian gravy and swap turkey for roasted root veg or crispy halloumi.
Why it works: A guilty-pleasure mashup of nachos and a hot sub.

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Veggie Christmas Feast Ciabatta (Fully Vegetarian Option)

What’s in it: Warm brie or cheddar, leftover roasted carrots/parsnips, red cabbage, crispy roast potatoes, a smear of cranberry, and veggie gravy drizzle.
Why it works: Packed with colour, texture, and full-on festive flavour—100% veggie without compromising indulgence.

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So before the last crumbs disappear and the decorations come down, give those festive leftovers one final moment in the spotlight. These sandwiches prove that Boxing Day bites can be just as exciting as Christmas dinner itself — quick to make, packed with flavour and perfect for sharing. Less waste, more taste, and plenty of reasons to keep the festive spirit going a little longer.