Wash the avocado with cold water, cut in half and remove the pit.
Prepare the filling for the rolls. Cut the fish into slices of medium thickness, up to 1 cm. Cut the prepared avocado into slices of medium thickness.
Place cling film on top of a special mat for preparing rolls. Place a sheet of nori on it. Place a thin layer of rice on half a sheet of nori, and on top of it - prepared rice and avocado.
Using a mat, roll up the roll. It should be quite dense and hold its shape well. Roll the roll in sesame seeds. Cut the finished roll into equal circles 3 cm thick.
Serve salmon and avocado rolls as a cold appetizer or a meal on their own. When serving portioned, place them on a bright plate, garnish with ketchup and mustard, and sprinkle with sesame seeds.