Vegetable sushi, no soy sauce though its made with garlic
Cut cucumber in long quarters
Make 2 cups dry rice
Mix together 1/4 cup brown sugar and 1/2 cup unseasoned rice vinegar +1 tsp salt
Add the mixture to the rice after it finishes cooking and while it's still hot
Mix it in until it starts to get sticky
Get a small cup of room temp water
Take seaweed sheets and spread the rice thinly across it, leave ~2 cm at the end unriced (for sealing)
Lay the cucumber across the rice and roll it up, doing the uncovered end last. Use the water to moisten the 2cm stretch so that it sticks to the roll and seals it closed.
Cover and refrigerate them until they cool, cut and eat

You can top with toasted sesame seeds for added flavor.
Candied ginger is also nice.
Matchsticked carrots marinated in sugar and vinegar too.
You can get creative with the vegetable.
I like my wasabi in soy sauce so I won't suggest it.

Edit:
I should also mention that different rice will have different results. Cal-rose rice works well. Basmati rice not well.
Edit 2:
Jfc i forgot salt of course. It gets mixed in with the vinegar and sugar.