Ultimate Roast Beef Sandwich Recipe

Name: Ultimate Roast Beef Sandwich
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4 servings
Ingredients: 2 ounces unsalted butter, softened; 4 slices of crusty white bread; 2 tablespoons English mustard; 8 ounces roast beef, thinly cut; watercress, to serve; ⅔ cup heavy cream, lightly whipped; ⅔ cup mayonnaise; 6 tablespoons horseradish, freshly grated; 2 tablespoons English mustard; 1 dash Worcestershire sauce; 1 tablespoon lemon juice; 1 pinch sugar; salt & freshly ground black pepper; 12 ounce unsalted butter; 2 leeks, washed and thinly sliced; 2 tablespoons muscovado sugar; 2 tablespoons dry white wine; 2 ounces butter; 2 potatoes, cubed

Servings: persons

2 ounces unsalted butter, softened
4 slices of crusty white bread
2 tablespoons English mustard
8 ounces roast beef, thinly cut
watercress, to serve
⅔ cup heavy cream, lightly whipped
⅔ cup mayonnaise
6 tablespoons horseradish, freshly grated
2 tablespoons English mustard
1 dash Worcestershire sauce
1 tablespoon lemon juice
1 pinch sugar
salt & freshly ground black pepper
12 ounce unsalted butter
2 leeks, washed and thinly sliced
2 tablespoons muscovado sugar
2 tablespoons dry white wine
2 ounces butter
2 potatoes, cubed

1
To make the horseradish sauce, combine the cream, mayonnaise, horseradish, mustard, Worcestershire sauce, lemon juice and sugar.
2
Season to taste with salt and freshly ground black pepper and then set aside.
3
Melt the butter over a medium heat in a frying pan.
4
Add the leek and cook for 8-10 minutes until wilted.
5
Add sugar and wine and cook gently for 20 minutes until the leeks have caramelised.
6
For the potatoes, melt the butter in a frying pan and fry the potatoes until soft and golden.
7
Meanwhile butter one side of each piece of bread and season.
8
Fry the bread, on the buttered side for 1 minute and dust with pepper.
9
Spread mustard on the soft, unbuttered side of the bread and reserve.
10
To assemble the sandwiches, layer the potatoes, leeks, horseradish and roast beef on the toasted bread, top with bread to form a sandwich, cut diagonally, secure with a toothpick and serve with watercress.

1558

kcal

Calories

146

Fat

Carbs

Protein

Fat Carbs Protein

* Per serving · 4 servings · Values may vary.

Tips for the best results

Read through all the steps once before you start and measure out your ingredients first — it makes everything go more smoothly.
Taste as you go and adjust the seasoning before serving.
Avoid overcrowding the pan — cook in batches if needed for the best texture.
Let the dish rest for a few minutes before serving so the flavors settle.
Store leftovers in an airtight container in the fridge and enjoy within a few days.

Variations & substitutions

Use a neutral oil or a plant-based spread in place of butter for a dairy-free version.
Brown sugar instead of white sugar adds a deeper, more caramel-like flavor.
Coconut cream is a reliable plant-based alternative to dairy cream.

No specific allergen information. Please check the ingredient list for possible allergens.

My Personal Notes

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How did you like this recipe?

This recipe makes 4 servings. You can adjust the portion size directly on this page.

You need 19 ingredients. The key ingredients include: 2 ounces unsalted butter, softened, 4 slices of crusty white bread, 2 tablespoons English mustard, 8 ounces roast beef, thinly cut, and more.

Yes, Ultimate Roast Beef Sandwich falls under the Meat & Poultry category and is a great choice for this type of meal.

Store leftovers in an airtight container in the refrigerator for up to 3–4 days. Reheat gently before serving.

That's it — enjoy your meal!

Ultimate Roast Beef Sandwich

Tips for the best results

Variations & substitutions

My Personal Notes

How did you like this recipe?

Frequently Asked Questions