It has turned out to be a Blueberry Poundcake night:
3/4 cup butter
3/4 cup sugar
1 tsp. vanilla
3/4 cup blueberries, tossed with a handful of flour
Cream butter and sugar, add eggs and beat well.
Add flour and salt, mix well, then fold in blueberries.
The recipe calls for a 10" springform pan,
which would be too large, I think. And lacking
that (at other house!) I just used an 8" square
pyrex pan -- not as pretty, but turned out
and dusted with powdered sugar, I don't think
anyone will turn it down because of its right angles.
Almost forgot: bake at 325 degree for 45-60 minutes.