Cook rice according to the instructions given and set aside.
Carefully cut the tuna and salmon sashimi into cubes. Make sure you use a sharp knife so not to shred/destroy the fish while cutting.
In a small bowl, mix together the sesame oil, soy sauce and orange juice.
Place the sashimi in a large bowl, pour in the sauce and add all of the ingredients except the rice. Using a spatula or large spoon, carefully fold the ingredients together so the pieces of sashimi and chopped veggies are coated in the sauce.
Enjoy the poke over cooled, cooked rice and garnish with sesame seeds and green onions.
Season with additional soy sauce but careful not to get carried away!