Translation:I eat sushi with chopsticks.
For those who – like me – were wondering about the particle で here:
The particle で can also be used to indicate means, method, or instruments. It translates into “by”, “with”, “in,” “by means of”, etc.
Depends on the sushi though. Nigiri sushi, the kind with something (usually fish) on top of a bed of rice, can be eaten with fingers or chopsticks. (The Nigiri of nigiri sushi literally means "to grip" referring to how sushi chef's grip the sushi to press the fish and rice together)
Maki sushi, the sushi roll things in the middle of rice with a wrap outside (usually nori) is only eaten with chopsticks.
mayyyyybe if you are with really close friends who don't care about your uncultured manner, then you might eat maki sushi with your fingers.... otherwise, just, no.