PREHEAT oven to 350°F. Mix flour, cereal, sugar, baking powder, lemon zest and poppy seed in large bowl; set aside. Beat eggs, yogurt and margarine in medium bowl until well blended. Add to flour mixture; stir just until moistened.
SPOON evenly into 12 greased medium muffin cups.
BAKE 20 min. or until lightly browned. While muffins are still warm, poke hole into the top of each muffin using handle of wooden spoon. Fill evenly with jam. Serve warm.