PointsPlus Slow Cooker Beef and Vegetable Stew

Name: PointsPlus Slow Cooker Beef and Vegetable Stew
Ingredients: 2 cups frozen onions, chopped; 3 pounds lean boneless beef brisket, trimmed and cut into 1-inch pieces; 2 medium-sized cloves garlic, minced; 2 medium-sized sweet potatoes, peeled and cut into bite-size chunks; ½ pound baby carrots, halved if large; 8 small new potatoes, halved; 16 prunes, pitted*; 4 tablespoons lemon juice; 5 teaspoons honey; 1 ½ teaspoons salt; ½ teaspoons black pepper; ¼ teaspoons ground cinnamon; 1 cup canned beef broth; 1 tablespoon flour (optional)