Preheat the oven to 400 Degrees F. Sprinkle the lemon juice on the berries and use the berry mixture to fill 6 custard cups 2/3rds full. Sift the next 3 ingredients together, and set aside. Work the shortening with a spoon until creamy. Gradually add the sugar, working until light. Beat in the egg and flavoring with a spoon. Add the flour mixture and milk all at once, stirring to mix. Spread on the berries. Bake in a moderately hot oven, 400 Degrees F., for 30 minutes or until done. TO SERVE: Turn out with the berry side up. Serve warm, with heavy cream or Vanilla Ice Cream.