Sushi is easy to make and the ingredients are easy to find. Specifically, as long as the following materials are probably enough:

Raw materials; Porphyra (available in the supermarket), ham or crab sticks, cucumbers, big roots (yellow pickles, forget it, I use Wujiang mustard tuber instead, available in the supermarket), shredded carrots, rice, salad dressing, tomato sauce, and summer sleeping mat (available in the supermarket). Everything else is available (for example; Eel, yolk, salmon).

Production method; Put seaweed on the mat, spread rice, spread sand sauce, put the raw materials in order, roll them up, and use some force. Cut last.

With the above methods, you can make simple sushi.