In this question here you haven't mentioned how many people will join with the party.But if you want the best qualities food in your birthday you have
pay a lot amount.You could arrange some special homemade foods,Like pasta,macaroni salad.cookies and chocolate chip milkshake.
Those are healthy too.You could try this site for more help. French macaron Recipe
Yes you could produce pasta and macaron in a birthday program.Those delicious and helpful for your health.You could also make some pudding,milkshake,hotdog at your home for birthday party.And never buy those food from shop.You could get some more help from this following site. French macaron Recipe