Walnut Yogurt Ring
["2/3 c. butter or margarine", "1 c. sugar, divided", "2 eggs", "1 (8 oz.) container plain yogurt", "1 tsp. grated lemon peel", "1 tsp. vanilla", "2 c. flour", "1 1/2 tsp. baking powder", "1/2 tsp. baking soda", "1/2 tsp. salt", "1 c. coarsely chopped walnuts, divided", "1/2 tsp. cinnamon"]
["Cream butter with 3/4 cup sugar until light and fluffy.", "Beat in eggs, 1 at a time, until blended.", "Stir in yogurt, lemon peel and vanilla.", "Sift flour, baking powder, baking soda and salt together.", "Add to creamed mixture, stirring until smooth.", "Add 3/4 cup walnuts.", "Turn half of the batter into a greased, floured 9-inch tube pan."]
["butter", "sugar", "eggs", "yogurt", "vanilla", "flour", "baking powder", "baking soda", "salt", "walnuts", "cinnamon"]