Slice the tuna into 1/2 inch cubes. Cut our white cartilage and discard as much as possible.
Mix all ingredients together. You may wish to add more mayonnaise for flavor.
Cover mixed poke and place back in fridge.
Cook rice according to package instructions.
Optional: add seasoned rice vinegar to rice with salt and sugar to make sushi rice. Add all ingredients to make sushi rice (vinegar, salt and sugar) to the rice bowl. Mix while rice is warm.
Serve cold poke over warm rice.