1. Another vote for seafood - Saltwater fishing is one of my dad's favorite hobbies. He also enjoyed crabbing on non-fishing days. So, seafood was sort of a family affair. Go catch fish/crabs as a family, help clean/cook/prep fish or crabs as a family, and spend summer nights eating your catch outside as a family. If you had a good catch, invite the neighbors and have a feast with friends.
2. Tart Cherries - My dad used them for joint inflammation before eventually going for replacement surgery, I've used it for inflammation from random joint pain and running soreness, and most recently...DD15 has been consuming the fruit and juice for soreness and inflammation from her practices.
3. Chicken - It's one of those foods that can go into just about anything. Pretty much every culture has poultry dishes, it can be made super healthy or in super rich dishes, with the exception of dessert- it can easily work into every meal and course, it's relatively inexpensive, it freezes well, and it's an easy way to add in protein.