Solar Blueberry cake

For Dan's Birthday, I gave him a history/cooking book, "A Garden Supper Tonight: Historical Seasonal Recipes & Home Lore."  From the July recipe for Summer Lemon Cornmeal Plum Cake, I turned it into Solar Blueberry cake. 

Dry ingredients
1 cup flour
1/2 cup cornmeal
1 t baking powder
1/2 t salt
1/2 cup sugar

Liquid ingredients
1/2 cup almond milk
1/4 cup olive oil
1 egg

I mixed the wet and dry, poured it into the oiled Teflon pan, added a cup of blueberries, and baked it from 10:30 to 1:00 in the Haines Solar Cooker.  It was probably done by 12:30.   Part of the time, there were some leaf shadows.  The blueberries were bubbling/boiling.  Delicious.

This is the testimonial to how good it was!