Blend thoroughly fresh or frozen and drained spinach.
Beat together eggs with sugar, then add oil, lemon juice and vanilla and beat again.
Mix flour with baking powder and lemon zest and combine with wet ingredients.
Pour into two 9 inch cake pans.
Bake in a preheated oven at 350 degrees for about 40 minutes.
Cut 8-10 mini-cakes from two cake layers.
Beat together soft butter and mascarpone until fluffy.
Add milk and vanilla and beat again.
Gradually add powdered sugar and beat to combine.
Spread strawberry jam on each bottom cake layer.
Cover with the top layer.
Spread buttercream on top of each cake.
Top with 2-3 strawberries.