Here are suggested sushi ingredients. Many don’t need soy sauce or wasabi, but it doesn’t hurt. Mixing and matching is fine. Pairs like umeboshi and scallions are particularly good.

Avocado

Cooked chopped spinach, perhaps with a bit of sesame oil

Cucumber, raw or lightly pickled

Daikon and other radishes

Escabeche of eggplant or other vegetables

Fried tofu (sold in Japanese stores)

Olives

Pickled eggplant

Pickled mustard greens

Pickled winter squash

Poached asparagus or other vegetables

Radish sprouts or other sprouts

Raw or seared tofu, cubed

Roasted eggplant

Roasted pepper, with or without anchovy

Sautéed mushrooms

Scallions

Scrambled eggs (or fried or poached quail egg)

Speck or prosciutto

Thinly sliced cooked meat

Umeboshi, pitted and halved

Watercress or arugula.