Cut all of your choices for filling into thin strips to make forming the sushi as easy as possible.
Spread a Sushi Mat out on your counter or work surface (You can also use a towel or a place mat.) Take 2 sheets of nori and lay them so they overlap for about 2 inches. Wet your hands and spread about 1/2 cup of the rice onto the top sheet of nori. Sprinkle with sesame seeds as desired and layer your veggies and "meat" or tofu to form a line from side to side.
*The sushi seasoning is a great addition if you'd like a completely traditional sushi flavor but it's not necessary. (I usually skip it actually) Same for the sugar, and and vinegar.
**I used bell peppers, zucchini, and carrots but there are many different veggies that you could use to replace them, like cucumbers or microgreens.