Place all ingredients in a bowl, and mix. Let sit at room temperature until the flavors mingle, and the corn defrosts, at least 15 to 20 minutes. Taste, and add more lime juice or ume plum vinegar, if needed. Serve on a bed of radicchio or leaf lettuce, and garnish with thin slices of avocado, if desired.
5g fat (22% calories from fat),