I don't have process photos for this recipe, but after spying concord grapes at the farmer's market, Mark was reminded that he wanted to make his Grandma Stone's concord grape cake. It's basically an upside down cake with a concord grape topping, but don't let that simple description fool you. It was delicious. I'm glad my grandpa and parents picked and preserved a bunch of concord grapes for us so that we can make this at some point this winter. There's no grape like a concord grape.