Spicy Beef and Persimmon Korma

Name: Spicy Beef and Persimmon Korma
Ingredients: 4 persimmons, cubed; 1 red onion, finely chopped; 1 1-inch ginger, finely chopped; 3 Thai green chilis, finely chopped (adjust to taste); 1 tablespoon cumin seeds; 2 tablespoons grapeseed oil (or any other cooking oil); 1 pound lean minced beef; 1.5 cups crushed tomatoes; 2 tablespoons garam masala; 1 tablespoon black pepper; 1 tablespoon coriander powder; 1/4 teaspoon mace powder; 1/4 teaspoon nutmeg powder; 1/4 teaspoon clove powder; 1 tablespoon turmeric powder; 1 cup Greek Balkan yogurt; 1 tablespoon salt; 1/2 bunch fresh cilantro leaves, roughly chopped; 1 cup chicken or beef stock