Preheat oven to 425°.
Combine first 3 ingredients in a large bowl. Combine yogurt and egg in a small bowl; stir well. Add to dry ingredients, stirring just until dry ingredients are moistened.
Turn dough out onto a lightly floured surface; with floured hands, knead lightly 4 to 5 times. Pat dough into a 9-inch circle on a baking sheet coated with cooking spray. Using a knife coated with cooking spray, cut dough into 12 wedges, cutting to, but not through, bottom of dough.
Bake at 425° for 12 minutes or until lightly golden. Serve warm.