Preheat oven to 350 degrees. Thoroughly grease a 9 or 10-inch round cake pan.
Combine strawberries, sugar, corn starch and vanilla. Pour into bottom of pan.
In small bowl, mix together flour, baking powder, cinnamon and salt. Set aside. In mixer, beat eggs and sugar together well. Gradually add butter and oil. Alternate adding the dry and wet ingredients into batter. Spoon batter over strawberries evenly.
Bake at 350 for 45-50 minutes or until toothpick inserted in center comes out clean. Cool 10 minutes in pan, then invert onto serving plate. Serve with a scoop of vanilla ice cream.