Roast Beef Sauce

Traditional mayonnaise-based roast beef sauce with tuna, cheese and garlic. Some people might find the combination of beef and tuna quite strange, but that's how they eat it in Italy.
How to cook Roast Beef Sauce
Step 1

Grate the cheese and garlic on a fine grater.
Step 2

Break chicken eggs into a tall measuring cup.
Step 3

Beat the chicken eggs slightly until smooth.
Step 4

Gradually pour in vegetable oil in a thin stream and continue to beat the mixture with a blender. Before your eyes, the oil and eggs will begin to turn into a thick emulsion.
Step 5

Add grated cheese, tuna, garlic, Dijon mustard, sugar, salt and black pepper to the sauce.
Step 6

Blend the sauce until smooth.
Step 7

The roast beef sauce is ready.
Roast Beef Sauce - FAQ About Ingredients, Baking Time and Storage
Yes, you can replace tuna with cooked chicken, smoked salmon, or even mashed avocado for a different flavor profile.
Store in an airtight container for up to 3 days. Stir well before using as separation may occur.
Omit the tuna and add roasted mushrooms or mashed beans for a hearty vegetarian alternative.
Yes, whisk vigorously by hand, but blending ensures a smoother emulsion—especially when adding oil.
Try it with roast beef (of course!), grilled veggies, sandwiches, or as a dip for crispy potatoes.
Skip the sugar or use a keto-friendly sweetener. The sauce is already low-carb without modifications.
Freezing isn’t recommended—the emulsion may break when thawed. Prep fresh for best results.
Add a splash of warm water, broth, or lemon juice and blend until desired consistency is reached.
Freshly grated cheese melts smoother, but pre-grated works in a pinch (note: it may alter texture slightly).
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