1. Rinse well the sweet potatoes and wrap them in baking paper and foil after salting and drizzling them with a little olive oil. Bake in a preheated oven at 200°C for 30 minutes.

2. For the crust, put all the ingredients in a blender and grind them for 10-15 seconds.

3. Put the tuna fillets in a bowl and marinate them with the olive oil, lemon zest and the fish spices. 

4. Then coat them with the crust you prepared. Place a grill pan over medium heat and let it heat up well. Put the fillets in and cook them for 2-3 minutes on each side. 

5. Serve with the lettuce hearts and sweet potato.

Kali Orexi!