I make this with varying ingredients, depending on what is in season and what I have in the house.  It always includes a green, leafy, cooked vegetable, a protein, and rice.  It should only take 30 minutes to make from start to finish.  I start with cooking the rice, my vegetable, and then the toppings.   I made this tonight with the following ingredients:
-- 2 C Cooked Rice--white or brown 
--Sauteed Kale (recipe follows) 
--1 Avocado, sliced
--Pan-Grilled Tofu (recipe follows)
--Nori seaweed sheets, cut in 1/2 with scissors--they sell this at HEB under the sushi table--otherwise in the Asian section or an asian supermarket.  
I sometimes add:  
--Thinly Sliced carrot, jicama, cucumber, or shredded cabbage, or any cold veggie.    
--Smoked Salmon or shelled edamame or Pan-Seared Teriyaki Tofu (recipe follows). 
I assemble all the veggies on a separate plate and place in the middle of the table.  I put a plate of Nori sheets on the table as well.  I use whatever veggies I have in the fridge, and what is in season.  Tonight I used kale sauteed with peppers, and avocado.   I put the hot items on the person's individual plates:  rice, kale, and tofu slices.  Then let the assembly begin!  Take a piece of Nori, and put some rice, kale, 1/2 of a tofu slice, and a slice of avocado.  Roll in a cone like fashion so that nothing comes out the bottom, and voila--delicious!  My husband likes soy sauce on the final product--he's a salt lover.  The smoked salmon or shelled edamame versions are also his favorites.  A little sesame dressing, or peanut sauce is good too for a more gourmet touch.   
Sauteed Kale:  This is my favorite way to eat kale.  I saute 1 small to med. onion in 2-3T olive oil 3 minute (till transluscent).  I add 1/2 teaspoon salt, and sometimes appx 1/2 teaspoon of red pepper flakes, or a anaheim or serrano pepper.  Then add 3-6 cloves of garlic, minced, and saute one additional minute.  Then add 1 bunch of washed, coarsely chopped kale, and 1 C water.  I cook on med to med/low setting for 20-30 minutes, until water is gone and kale is tender.  I cover partially, with lid cracked to allow steam to escape and kale to maintain it's color.  If the kale is not done when water is evaporated, add 1/4 to 1/2 C more and cook an additional 5-10 minutes, and retry.  Season with salt and pepper to taste.
Pan-Grilled/Seared Tofu:  Slice a block of firm tofu into 10 slices (about 1/2 inch each).  Pour some homemade or store-bought teriyaki marinade (Central Market brand is good), or soy sauce over 1/2 inch slices of firm tofu.  Heat a grill pan or frying pan with 2 T olive oil or wok oil, and lay tofu on pan when it hot and tofu sizzles when hitting pan.  Cook on each side until brown--about 5-7 minutes on each side.