Preheat oven to 375°F. Mix flour, sugar, baking powder, sage, orange peel and salt in large bowl. Cut in butter with pastry blender or 2 knives until mixture resembles coarse crumbs.
Beat eggs, sour cream and vanilla in medium bowl with wire whisk until well blended. Stir in 1/4 cup of cheese. Add to flour mixture; stir until a soft dough forms. Place dough on lightly floured surface. Knead about 1 minute or until smooth. Place dough on greased baking sheet. Pat into a 10-inch circle. Score top of dough with sharp knife into 12 wedges. Sprinkle with remaining cheese.
Bake 30 minutes or until golden brown. Cool slightly on wire rack. Cut into 12 wedges to serve.