YOU SAID:
Yesterday I went to party with my friends who eat sushi
INTO JAPANESE
昨日は寿司を食べる友達とパーティーに行きました
BACK INTO ENGLISH
Yesterday we went to a party with friends eating sushi
INTO JAPANESE
昨日はお寿司を食べている友達とパーティーに行きました
BACK INTO ENGLISH
Yesterday we went to a party with friends eating sushi
You've done this before, haven't you.