Mix blueberries, 1/2 cup sugar, 2 tablespoons flour and lemon rind; spread
evenly into a greased and floured 9-inch springform pan.
Beat butter and 1 cup sugar until fluffy; beat in eggs and extracts. Mix flour,
baking powder and salt; beat into creamy mixture alternately with milk until
just moistened. Pour over blueberries and spread evenly. Bake 60-70 minutes or
until a wooden pick inserted in center comes out clean.
Let sit in pan about 5 minutes then place a serving plate over top of pan;
carefully invert cake and plate together. Remove sides from cake pan. Serve
warm, topped with almonds. Garnish with sweetened whipped cream as desired.
Refrigerate leftovers.