Guinness Irish Beef Stew

Ingredients

• 3 tablespoons olive oil or avocado oil
• 3 pounds chuck roast cut into 1-inch pieces, well-marbled, NOT extra-lean
• 1 onion large, chopped
• 2 celery ribs, chopped
• 6 cloves garlic minced
• 12 ounces guinness Draught Stout, nitro-brewed
• 2 cups beef stock
• 2 tablespoons tomato paste
• 1 tablespoon Worcestershire sauce
• 1 teaspoon sea salt
• 1 teaspoon freshly ground pepper
• 2 teaspoons dried thyme
• 2 bay leaves
• 5 large carrots large, peeled and cut into 1/2-inch thick pieces, about 3 cups
• 2 tablespoons fresh parsley chopped, or chopped kale if making the colcannon
• 2 pounds sweet potatoes peeled and sliced 1/4-inch thick
• 4 tablespoons butter melted, plus more for serving
• 2 tablespoons heavy cream
• 1/2 teaspoon sea salt
• 2 cups chopped kale or chard
• 1/2 ounce fresh chives chopped