I like to grill thick slices of red onion rubbed with garlic, salted, and coated with olive oil. But if you ever have a problem flipping them...they fall thru the cracks easily. Small pieces of marinated salmon is another grilled item I like because not everyone wants a whole filet or they want 'just a taste'. And of course, another great grill item is hot-dogs.
You can buy some fancy special made high price 'gadgets' to use on your grill for these things or maybe you just need to order one or two cooling racks for around $15 to $20? (and sometimes you can find a 2 pack of nonstick cooling racks for around $10 at Walmart or Target).
My hot-dogs always come out great and they don't run away or get burnt! Unless of course, you leave them unattended for a long time as with anything over a fire.
**UPDATE - I bought two non-stick racks at the Jeff Road Kroger grocery store last week for $7.99 on sale. August 2020**