. Difficulty: Easy
. Serves: 4 people
. Preparation time: 30 minutes + 12 hours for the tuna marinade
Ingredients12 slices of toast bread
200 g fresh tuna (shock frozen*)
10 g Fleur de Sel or organic salt
10 g brown sugar (demerara)
300 g courgettes
60 g di Grana Padano
100 g low-fat greek yoghurt
1 bunch of basil
1 tsp extra-virgin olive oil
Salt & pepper
PreparationMix the sugar and salt together then coat the tuna filet well. Cover and leave to marinate in the fridge for at least 12 hours. Rinse it quickly under cold water and dry with kitchen paper.
Slice the courgettes, grill them and season with oil, salt and pepper.
Season the yoghurt with pepper and the chopped basil.
Remove the crust from the bread slices then toast them at 180°C for 5 minutes.
Spread the toasts with the yoghurt sauce, layer six with the courgettes, thinly sliced tuna and shavings of Grana Padano.
Top with another slice of toast and cut each toast into four triangles
*Any raw fish, marinated or seared, must previously be shock-frozen before being prepared or eaten, to kill any bacteria.