The batter will be thick. Scrape and spread it into a buttered 8 inch pan. Press the batter down a bit in the center so it will cook more evenly. Though if you like that gooey center sort of thing then just let it be.
Slice and arrange peaches around the outside of the cake.Throw some blueberries or blackberries in the center for some color. You can sprinkle the fruit with coarse sugar. Or not.
Bake at 350 for 50 minutes then check. The edges should be brown and the center should look firm having puffed around the fruit, but this thing should not pass a toothpick cake test or it will be overdone.