Ingredients

• 2 tablespoons olive oil
• 1 cup chopped white onions
• 1 teaspoon chopped fresh ginger
• 1 teaspoon chopped fresh garlic
• 1/2 teaspoon cayenne pepper
• 1 teaspoon dried thyme
• 3/4 teaspoon allspice
• 1/8 teaspoon celery salt
• 3 cups vegetable broth
• 1 (14.25 ounce) can tomato puree
• 2 (16 ounce) cans refried black beans
• 1/8 teaspoon black pepper
• 1 teaspoon white sugar
• 2 (15 ounce) cans black beans, rinsed and drained
• 1/4 cup fresh lemon juice
• 1 (8 ounce) container sour cream