Ingredients:

• 2 pounds oxtails
• 1 strip dried orange peel (zest, not the pith), see recipe note
• 2 whole star anise
• 1 (2-inch) piece fresh ginger, thinly sliced
• Salt, at least 1 tablespoon, plus more to taste
• 1/2 cup shelled and skinned raw peanuts (can sub roasted unsalted peanuts)
• 1/8 teaspoon chili pepper flakes (or more to taste)
• 2 cups loosely packed coarsely chopped fresh mustard greens
• Garnishes:
• Fresh cilantro, chopped
• Green onions, white and green parts, sliced on the diagonal
• Freshly grated ginger