Instructions

  1. Heat the oil over medium high heat till it stops sizzling.
  2. Add onions and reduce the heat to medium-low.
  3. Cook slowly, stirring occasionally, until golden brown and caramelized, about 30 minutes.
  4. Add the thyme, rosemary, garlic, salt, and pepper, and vinegar stir well to combine.
  5. Cook for 5-15 more minute.
  6. Add beet greens just to wilt.