Ingredient:

• 1 tablespoon olive oil
• 1 ½ pounds lamb shoulder arm chops, cubed, round bones reserved
• 1 teaspoon salt
• ½ teaspoon ground black pepper
• 1 onion, chopped
• 4 cloves garlic, minced
• 1 cup lentils, picked over and rinsed
• 2 cups chicken broth, or more as needed
• 1 (14 ounce) can diced tomatoes
• 3 carrots, peeled and sliced
• ½ teaspoon dried thyme
• ½ teaspoon dried sage
• ½ teaspoon dried basil
• 2 cups coarsely chopped fresh spinach
• 1 lemon, juiced and zested
• ½ cup ricotta salata cheese, crumbled