231 Ellsworth!. Have you tried 321 Ellsworth? It's not a 'health food' restaurant, but it's very good and they have a lot of great fish dishes (sake cured salmon, hamachi, halibut) and use a lot of fruits and vegetables (try the chilled cucumber soup!).
Sushi is very healthy and tasty! Joy Sushi has a great variety of Sushi rolls to please anyone's tastes, on B street. Sushi Sams on Third St is also a great sushi place. I have also had wonderful grilled fish at Kaimuki Grill on El Camino near second street.
For fun with a group, try the hot pot at Sheep King on El Camino between 22nd and 23rd. We had a split pot: one was very spicy and the other not, but both intensely flavorful. Choose lots of veggies and have fun with the sauces at the table. We also added more water as we cooked, to keep it going.