1 c. butter
2 c. sugar
1 tsp. vanilla
4 eggs
3 c. flour
1 tsp. salt
1 tsp. cream of tartar
1/2 tsp. baking soda
3/4 c. plain yogurt
2 tsp. grated lemon rind
2 c. diced prune plums
1 c. chopped nuts

Cream butter with sugar. Add vanilla. Add eggs, one at a time, beating after each addition. Sift flour, salt, cream of tartar and baking soda. Blend yogurt and lemon rind. Add to creamed mixture, alternating with dry ingredients. Add plums and nuts; mix well. Divide between 3 greased and floured loaf pans. Bake at 350 degrees for 50-55 minutes or until tests done.