Preheat oven to 400°F.
Combine flour, sugar, baking powder, baking soda and salt in a 2 to 3 quart mixing bowl. Cut in butter with pastry blender until mixture resembles coarse crumbs.
Stir in ¾ cup cheese, breaking up clumps and coating cheese with flour mixture. Combine buttermilk and egg. Stir buttermilk mixture, thyme and apples into flour/cheese mixture; mix until dry ingredients are moistened.
Gather dough into a ball and knead against the sides and bottom of the mixing bowl- (if necessary dust hands with ½ Tablespoon flour). Turn dough and press loose pieces until they adhere and the bowl is fairly clean.
Form into a ball and place on buttered or parchment lined baking sheet; pat into 8-inch circle. Cut into 8 wedges and separate pieces ½-inch apart. Sprinkle wedges evenly with remaining cheese. Bake 20 - 25 minutes or until lightly browned.