If you are not planning to grill burgers for the 4th of July, then at least consider a very good potato recipe to go with your Kebabs. We tried this potatoes at a church family day and they were amazing. When my mother supplied me with some of fresh garden potatoes, I instantly had a plan for them.
Age of the potato does have an effect on the taste. Young potatoes have a nice, fresh scent to them, are firm in texture and overall taste much more fresh. They do cook quick, so be sure not to overcook it. You can find fresh, garden potatoes at a local farmer's markets, or if you are lucky enough, your mom's or grandma's garden! :)