Combine dried cherries, red wine vinegar and balsamic vinegar in a medium mixing bowl. Let soak 30 minutes.
1 1/2 cups dried tart cherries, 1/2 cup red wine vinegar, 1/4 cup balsamic vinegar
Heat olive oil in a large skillet. Add onion; cook 5 minutes, or until onion is soft. Add sugar; mix well. Cook, stirring occasionally, over low heat 10 minutes.
1 tbsp olive oil, 1 large red onion, 2 tbsp granulated sugar
Add cherries with soaking liquid to onion mixture. Simmer, uncovered, 10 to 15 minutes, or until almost all the liquid is evaporated. Season with salt and pepper. Serve warm.