2 tablespoons vegetable oil, or as needed
2 pounds cubed lamb stew meat

2 tablespoons vegetable oil
1 onion, chopped
2 tablespoons ground coriander
1 1/2 teaspoons ground cumin
1 tablespoon ground cardamom
1 teaspoon ground ginger
1 teaspoon ground turmeric
1/2 teaspoon garlic powder
1/4 teaspoon ground black pepper
1/4 teaspoon cayenne pepper, or to taste

2 cups beef stock
salt to taste

1/4 cup plain yogurt
1 teaspoon lemon juice