Signatures Sandwiches

La Nonna: The Roast Beef and Truffle Sandwich that Reinvents your Lunch

When roast beef meets truffle, it’s love at first bite. Discover our signature recipe that transforms your lunch break into a gourmet moment.

Gourmet La Nonna sandwich filled with rare roast beef and truffle mayonnaise with arugula in Wavre
Author Tartineke
04 Dec 2025

Who said a sandwich has to be boring? There are days for the classic ham and cheese, and there are days when you want to treat yourself, to offer yourself a real gourmet break in your daily routine.

It is for those moments that we created La Nonna. More than a sandwich, it is a chef's recipe slipped into a crispy baguette.

The Elegance of Truffle, the Character of Roast Beef

This sandwich is one of our biggest hits at Tartineke, and from the first bite, you understand why. It all relies on the balance of noble flavours:

  • The Roast Beef: Forget grey and dry meat. Our roast beef is cooked rare, retaining all its tenderness and authentic meat taste.
  • The Truffle Mayonnaise: This is the star of the sandwich. It brings that inimitable, earthy, and captivating scent that pairs divinely with the beef.

An Irresistible Play of Textures

But taste is not enough, you need depth. To avoid monotony, we added ingredients that awaken the palate:

  • The Arugula: With its peppery notes, it cuts through the creaminess of the mayonnaise and brings freshness.
  • The Fried Onions: The little "Crunch" that makes all the difference. They bring a crispy note that makes every bite addictive.
  • The Tomatoes: For juiciness and lightness.

A Gourmet Experience to Take Away

Why wait for a restaurant in the evening to eat well? With La Nonna, we want to offer you this gastronomic quality on the go.

It is the ideal choice for those who want to transform their lunch break into a real tasting moment, served generously in our fresh daily bread.

Fancy something chic for lunch? Let yourself be tempted by La Nonna. Warning: to try it is to love it!

Signatures Sandwiches
Updated on 21 Jan 2026