A fun idea for entertaining at home is a temaki-zushi party. Hand rolls (手巻き寿司) are interactive and as each person makes their own rolls it can be a good way to keep everyone happy. Some supermarkets and department store seafood sections will sell the seafood already cut for the rolls, especially on weekends and holidays.
Ingredients are whatever you like. A pot of rice and nori cut in half, as these are easy to roll by hand. For fillings, you can see in the photo above, we have starting from the upper right going clockwise: salmon, tuna, imitation crab, boiled scallops.
mekabu kombu, canned corn with mayonnaise, canned tuna with mayonnaise, and hikiwari natto
shirasu (boiled sardines), avocado, julienned myoga (ginger buds), shiso, denbu (sweetened cod fish colored pink), and ikura
cucumbers, kaiware (daikon sprouts), mizuna greens, and carrots.
Other fillings you could include:
tamagoyaki (Japanese omelet), Japanese pickles, seasoned kampyo gourd (sold at supermarket already cooked), roasted salted salmon, cream cheese, toasted sesame seeds, unagi, and more.
We also put out small plates with soy sauce for dipping the rolls and small bowls if anyone wants to make a salad.
When I visit my dear aunt in Osaka we usually have okonomiyaki one night, and the other night is usually temakizushi. It is festive, fun and also a great option for hot summers as they only thing you have to cook is the rice.