How to Make It
Sauté onion and next 3 ingredients in hot oil in a large skillet or wok 1 minute. Stir in salt and black pepper. Add greens; sauté 2 minutes. Add sugar and vinegar; cover and cook 3 minutes or until wilted. Remove and discard serrano pepper before serving.
* 1/2 jalapeño pepper, split, may be substituted.