I didn't want to make a fancy dessert for the 4th this year, but I still wanted it to look festive. I made an angel food cake from a boxed mix. All you do is add water, and I think they taste better than store bought. Slice it up, add a little whipped cream, strawberries, and blueberries, and you're done!
I started to make it look like a flag, but gave up when the strawberries started tipping over.