Shadis Soup e Mahicheh

Name: Shadi's Soup-e Mahicheh
Ingredients: 2 tablespoons olive oil; 1 large onion, chopped; 4 cloves garlic, minced; 1 (1 pound) lamb shank, excess fat removed; 6 cups water; 1 teaspoon ground turmeric; 0.5 teaspoon ground black pepper; 1 large carrot, chopped; 0.5 cup green lentils; 0.333 cup rice; 2 cups chopped fresh spinach; 0.5 cup chopped fresh parsley; 0.5 cup chopped fresh cilantro; 1 teaspoon salt; 1 medium lemon, juiced