Wash and dry the lime and grate half of the peel. Squeeze the lime. Peel ginger and dice it roughly. Peel mango and cut the flesh from the stone.
For the sauce, blend half the mango, ginger, honey, lime juice and vinegar with a hand blender. Season to taste with salt and pepper. Stir in lime zest.
Salads clean, wash, spin dry and pluck smaller. Cut remaining mango into thin slices. Mix with the salad and the mango sauce.
Roast the sesame seeds in a pan without fat and place them on a flat plate. Wash the tuna, dab dry and cut into 2 pieces, season with salt. Heat the oil in the pan. Fry the fish for 2-5 minutes on each side (depending on the desired cooking state).
Roll fish in sesame seeds. Cut into slices and arrange on the salad. Add flatbread.