Moms-- any ideas on a summer appetizer or main dish for a potluck type get together for around 20 people?

Fruit kabobs. Cut various fresh fruits like cantaloupe, watermelon, pineapple, strawberries, honeydew, mango, apple, gs, etc into 1-1.5 inch cubes then arrange them on kabob sticks (about a buck for 100 sticks at Walmart). For presentation you could use half a watermelon husk cut side down with kabobs sticking out of it. Take it to the next step by rolling each kabob in yogurt and coating with grated coconut (I don't really like coconut so I never do this step, but a lot of people do). Plan 1-2 kabobs per person. Because its on a stick it makes it a great potluck easy to handle food.