Pierogis and Cabbage

• 1 box frozen potato-and-onion pierogis
• 1 tbsp. olive oil
• 1 red onion
• 1/2 small red cabbage (about 1 lb)
• Kosher salt and pepper
• 2 tbsp. balsamic vinegar
• 1 tbsp. whole-grain mustard
• 2 tbsp. chopped fresh chives (optional)

1. Cook the pierogis according to package directions.
2. Meanwhile, heat the oil in a medium skillet over medium heat.
3. Saute the onion until tender, 6 to 7 minutes.
4. Add the cabbage, 1/2 tsp salt and 1/4 tsp pepper, and saute for 3 minutes.
5. Add the vinegar and cook, stirring occasionally, until the cabbage is wilted but still slightly crunchy, 4 to 5 minutes more; stir in the mustard and chives, if desired.
6. Serve with the pierogis.

onion, olive oil, red onion, red cabbage, kosher salt, balsamic vinegar, wholegrain mustard, fresh chives

Taken from www.delish.com/recipefinder/pierogis-cabbage-recipe-122818 (may not work)