Char-Roasted Coulotte Potato and Collard Green Hash

Ingredients

• One 1855 Angus beef coulotte (approx. 1 1/2 pounds)
• Two cups soy marinade (see recipe)
• Two bunches collard greens, washed and trimmed
• One pound Yukon Gold potatoes
• Two tablespoons salt
• Four ounces olive oil
• One teaspoon freshly ground black pepper
• Two Spanish onions, peeled and sliced thinly
• Two large cloves garlic, peeled and minced (to make one tablespoon)
• Eighth-teaspoon crushed red pepper flakes
• Pickled mustard seeds (see recipe)