In a large bowl, cream butter and sugar until fluffy. Beat in eggs, one at a time. Add sour cream and vanilla; mix well.
Combine the flour, baking powder, baking soda, salt and cinnamon; stir into creamed mixture just until moistened. Fold in strawberries and 1/2 cup nuts.
Pour into a greased 8-in. x 4-in. loaf pan. Sprinkle with remaining nuts. Bake at 350° for 65-70 minutes or until a toothpick inserted near the center comes out clean. Cool for 10 minutes; remove from pan to a wire rack to cool completely. Yield: 1 loaf.