Cook and Scale
Casse-Croûte Tunisien (Tunisian Tuna and Harissa Baguette)
2 servings · 35 min total
Tunisia's everyday sandwich: a crusty baguette slicked with harissa and olive oil, then packed with tuna, boiled egg, potato, olives and a shred of preserved lemon.

Ingredients
- 1 baguette
- 2 canned tuna, drained and flaked
- 2 egg
- 2 potato, peeled
- 2 tbsp harissa
- 3 tbsp olive oil
- 1 tbsp lemon juice
- 60 g black olives, pitted and halved
- 1 preserved lemon, rind only, finely sliced
- 1 tomato, sliced
- 1 tbsp capers, rinsed
- ½ tsp salt
- ¼ tsp black pepper
Contains: Gluten, Egg, Fish
Allergen info is best-effort — please verify yourself.
Method
- 1.
Boil the potatoes and eggs — Boil the potatoes in salted water for 15 minutes, lowering in the eggs for the final 9 minutes so both are ready together. The potatoes should give easily to a knife but still hold their shape.
- 2.
Cool and slice into rounds — Drain and cool everything under cold running water. Peel the eggs and slice them and the potatoes into rounds about 5 mm thick.
- 3.
Whisk the harissa dressing — Whisk the harissa with the olive oil, lemon juice, salt and black pepper into a loose, glossy dressing that pours off the spoon in a thick ribbon.
- 4.
Open and spread the baguette — Split the baguette lengthways but leave one side attached as a hinge, then pull out a little of the soft crumb from the top half to make room. Spread the harissa dressing over both cut faces, right into the corners.
- 5.
Layer the filling — Layer in the tuna, then the potato and egg slices, the tomato, the olives, capers and the slivers of preserved lemon. Drizzle over whatever dressing is left in the bowl.
- 6.
Press and let it soak — Press the sandwich firmly shut, wrap it tightly in paper and leave it for 15 minutes so the crumb drinks up the harissa oil. Cut in half on a slant and eat, or keep wrapped for a lunchbox.