Mexican Plum-Tomato Cups

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Mexican Plum-Tomato Cups
Makes 20 appetizers
Tomato Cups
10 medium plum (Roma) tomatoes
1 ripe large avocado, pitted, peeled and finely chopped (about 1 cup)
1/2 cup finely chopped cucumber
1 medium jalape?o chile, seeded, finely chopped
3 to 4 tablespoons chopped fresh cilantro or parsley
2 tablespoons lime juice
1/2 teaspoon salt

Topping
1/2 cup sour cream
2 teaspoons whipping cream or milk
1/2 teaspoon grated lime peel
1/2 teaspoon salt
Cut each tomato in half crosswise. Using teaspoon, scoop out seeds and pulp from each tomato half, leaving enough tomato for a firm shell. If necessary, cut small slice from bottom so tomato half stands upright.
In medium bowl, mix remaining tomato cup ingredients. In small bowl, mix topping ingredients. Spoon about 1 tablespoon avocado mixture into each tomato shell. Top each with about 1 teaspoon topping.