An alternative that I hadn't thought of before to the grainy side dish...

Succotash!

Made because I wanted to put corn, beans, and squash on the table to correlate with Oscar's reading for American history.

The squash (acorn, baked with butter and brown sugar) was just okay.  The succotash, which I served as a bed for salmon patties -- Maryland crab cakes would have been more in keeping , I suppose, but I had the canned sockeye salmon and not the fresh Maryland crab -- was surprisingly yummy for something that takes two minutes to put together and 15 minutes on the stove. 

• 1 15-oz can kidney beans, rinsed and drained 
• 1 small bag (about 2 cups) frozen baby lima beans
• 4 cups frozen corn kernels 
• 4 Tbsp butter 
• 1/4 tsp nutmeg, or to taste (freshly ground would be better of course) 
• Salt and freshly ground black pepper 

  Melt butter in a saucepan or skillet that can be covered and that is deep enough to hold everything comfortably.  Add corn and both beans.  Stir to coat everything with butter, then cover and heat on low or medium, stirring occasionally, until everything is hot.  Season with nutmeg, salt, and pepper, and serve immediately.

It was equally good the next morning as a base for fried eggs.   I think it would make a great potluck dish if you were able to ensure it stayed hot (so the butter won't congeal).