Step #1 In a bowl beat eggs, flour,sugar & salt together.
Step #2 Heat a non stick or lightly oiled pan on a medium heat.
Step #3 I normally use a small frying pan to give me a 1/4 inch thick omelette.
Step #4 Cook egg mix until golden on both sides.
Step #5 Allow to cool & slice into 1/2 inch thick slices.
Step #6 Slice the spring onions lengthways into long thin strips.
Step #7 Depending on preference you can use the white only or all parts of the onion.
Step #8 In a small dry frying pan place the sesame seeds & heat over a medium heat until they turn golden brown & become aromatic; watch carefully they burn very easily.
Step #9 Assembling the sushi.
Step #10 There are two ways to assemble this sushi you can either make fat rolls (futomaki) or layered sushi (nigari) I will describe both.
Step #11 Rolls (futomaki):.
Step #12 Lay a sheet of nori down on a sushi rolling mat.
Step #13 Spread 1/3 of the rice over the nori pressing down well; leave a 1 inch gap at the side nearest to you.
Step #14 Leave a 1 inch gap on the rice at your side & place 1/3 of the onion, sesame seeds & omelet; top this with a line of the mayonnaise.
Step #15 Take the inch of seaweed that is showing & fold over the rice, continue rolling up the seaweed using the mat if needed as an aid.
Step #16 You should end up with a cigar shaped roll.
Step #17 Remove the roll to a plate & place this in the fridge, make the other rolls in the same way.
Step #18 When the sushi is cool, use a sharp knife dipped in salted water to slice into 1/2 inch slices.
Step #19 The end sections will look untidy so eat them & arrange the rest of the pieces on a plate.
Step #20 Layered (nigari):.
Step #21 Line 9 x 13 inch pan with cling film.
Step #22 Place 1/3 of the sushi rice in a layer on the bottom.
Step #23 Place one of the nori sheets on the rice adding more around the sides if needed.
Step #24 Place the sliced omelet on top of the nori leaving 1/2 inch gaps between the slices.
Step #25 Place the spring onions in the gaps & top each one with a thin line of the mayonnaise.
Step #26 Sprinkle top with sesame seeds & top this with another sheet of nori.
Step #27 Add another 1/3 of the rice.
Step #28 Add the other nori sheet.
Step #29 Add the rest of the rice.
Step #30 Press down the top of the sushi with another pan covered in cling film.
Step #31 Turn the sushi out onto a board & using a sharp wet knife cut into squares.