How to make
Dissolve the baking soda in the yoghurt until effervescent. Add the sugar, oil, and flour while stirring. Homogenize the mixture and flavor it with vanilla or lemon rind.
Pour the mixture into a greased and floured baking dish. Distribute jam over it, using a fork, in a net pattern. If desired, sprinkle with some chopped walnuts; lightly press them into the cake.
Put this cake without eggs to bake in a heated 360°F (180 °C) oven until tender (about 20-25 minutes). Serve sliced.
