Best Potluck Dish

Off today to the kids' end of school year picnic at a park near their school. It is pot luck, although different grades get assigned different courses. This year, we are desserts, so I worked up pina colada and black forest trifles. I find trifles are great pot luck dishes because you can the amount you want without having to slice a cake -- it's a great take a little nibble dish.

For a main course, I like to make a vegan jambalaya (something our Louisiana readers would object to -- even if I do labor over the roux, stir, stir, stir). It's tasty and spicy without being too hot and is good on the side or in a bowl.

What are your suggestions for best pot luck dishes?