Beef Stew with Mustard Greens

Name: Beef Stew with Mustard Greens
Ingredients: 1/4 cup molasses; 1/4 cup soy sauce; 1 tablespoon grated peeled fresh ginger (from 1 [2-inch] piece); 3 large garlic cloves , grated (about 1 1/2 teaspoons); 1 (2-pound) boneless chuck roast , cut into 1-inch pieces; 2 tablespoons extra-virgin olive oil; 2 small cinnamon sticks; 1 sweet onion (such as Vidalia), coarsely chopped (about 2 1/4 cups); 1/4 cup tomato paste; 6 cups unsalted beef stock; 2 carrots , peeled, halved lengthwise, and thinly sliced (about 1 1/2 cups); 4 cups chopped mustard greens (from 1 medium bunch); 1 (14.5-ounce) can diced tomatoes (undrained); 2 tablespoons mirin