Sift all dry ingredients except sugar.combine sugar, lemon rind and oil. Mix in flour mixture and chopped lettuce. Add eggs, one at a time, beating well after each one. Stir in walnuts and pour into a 9 inch x 13 inch baking dish. Bake at 350 degrees F for 25-30 minutes, or is golden brown and tests clean.
Frosting:
Ingredients
1 1/2 cups powdered sugar
1/4 tsp. lemon extract
1/2 tsp. grated lemon peel
2-3 Tbsp. milk
1 Tbsp. butter, softened
Directions
Sift powdered sugar and combine with other frosting ingredients. Beat till smooth and put on cooled cake.