I really like The Burger Lounge in La Jolla. They have burgers and those kinds of things, but there's a salad there that I get w/ chicken and the dressing on the side and it has Jicama and corn and other veggies. I am sure that salad is very healthy. I dip my fork into the dressing, but really, I don't do it all that much and it's still good. Also, next door to the Burger Lounge (which is in La Jolla Village) is The Coffee Cup. It has excellent, healthy breakfast type items...lots of egg whites and veggies, but they also have things your hubby would enjoy too. Another good breakfast place is in Solana Beach and it's called Naked Cafe. It's also great for breakfast and lunch, but is closed for dinner. Their pesto scramble is yummy and so is their Oatmeal. Again, there's stuff like pancakes, etc. that aren't that healthy. I also like Kemo Sabe which is in Hillcrest (take a walk on University Avenue and you'll see fun shops). On 5th Ave & University, Kemo Sabe has excellent fusion food. Your hubby will probably enjoy Skirts on Fire, a signature dish that is VERY spicy! I had the Halibut that has a Teriake glaze. It comes on top of noodles, but you can ask them for their seaweed salad instead of the pasta.
If you like Moroccan food, there's Kous Kous on 4th Avenue (a block away from Kemo Sabe). I had their seafood dish that was some sort of a fish with shrimp and Kous Kous. Your hubby might like their meat that is cooked for 10 hours!
Finally, there's Pacifica in Del Mar. It's great to eat there any time, but during the day, ther'es a nice ocean view. I get their Salmon on top of greens, but there's plenty of other delicious fare to choose from.
I hope that helps! Have a great time!