Lobster Salad with Mango and Red Onion

3 tablespoons fresh lime juice 2 tablespoons rice wine vinegar 1 tablespoon sugar 1 garlic clove, minced 1 tablespoon olive oil 1/4 teaspoon salt 1/4 teaspoon coarsely ground black pepper 4 cooked lobster tails, sliced into medallions or chopped 1 cup diced mango 1/2 cup finely chopped jicama 1/4 red onion, very thinly sliced 1/2 jalapeño pepper, very thinly sliced 1/2 cup lightly packed fresh cilantro leaves 4 cups mixed salad greens