Preheat oven to 400°F, prepare pans. Blend the margarine & sugar together & beat in the eggs, milk or yoghurt, tangelo rind & juice, & poppyseeds. Mix dry ingredients & add to wet mix until just combined. Spoon into pans & bake for 20 mins. Makes 12. Nutritional Value: 197 calories per muffin. Tangelo - Citrus fruit cross of a mandarin & a grapefruit. Larger than a mandarin & a little smaller than an average-size orange. Skin colour is a bright tangerine and they mature during the late mandarin season. Mandarins, Tangerines or Oranges may be used instead.