Place dried cranberries in a vegetable steamer, cover and steam 2-3 minutes. Remove to a paper towel; blot and cool.
In a microwave, melt the chocolate. Remove from the heat and stir in the dried cranberries and walnuts. Spread evenly over a foil-lined baking sheet. Refrigerate 30 minutes or until candy is hard. Break into 2-in. pieces.