Cucumber slices, 1/2s (opt) Cucumber skin strips (opt) Fresh parsley sprig (opt) Heat oil or ghee in a saucepan. Add onion, Curry Powder, cayenne and ginger and cook gently 5 minutes, stirring frequently. Remove from heat and cool. In a blender or food processor, process cooled onion mixture, mayonnaise, tomato paste, Mango Chutney and half-and-half or yogurt until smooth. Turn mixture into a serving bowl. Chill at least 1 hour before serving. To serve, garnish with cucumber slices and skin strips and parsley sprig, if desired. Makes 1 cup. NOTE: The consistency of this dressing may be thinned with the addition of a little more half-and-half or yogurt, if desired. Dressing will keep in a covered container in refrigerator for several days. Serve as an accompaniment to cold meats and salads.