Preheat oven to 400F. Sprinkle berries with sugar; toss lightly to coat; set aside. In a large bowl, beat egg; add yogurt and melted butter or margarine; beat until smooth; add baking mix; stir until just blended; fold in berries and lemon zest. Spoon mixture into greased or sprayed muffin cups, 3 inch in diameter and 1-1/2 inch deep. Bake for 20-25 minutes, or until a toothpick inserted in the centre comes out clean. Cool for 5 minutes in cups; finish cooling on rack. Makes 6 muffins (large) Origin: Appeal (quarterly publication from Overwaitea Foods) Shared by: Sharon Stevens.