Chicken Curry Puffs

Name: Chicken Curry Puffs
Ingredients: 1 Tbsp. neutral oil; 12 ounces ground chicken or turkey; 1 cup diced yellow onion (about 1 small onion); 1 large garlic clove, minced; ¾ cup plus 3 Tbsp. water; 1 Tbsp. Madras curry powder; 1½ tsp. sugar; ¾ tsp. fine sea salt; ¼ tsp. ground black pepper; ¼ tsp. ground cumin; ¼ tsp. turmeric powder; 1 Tbsp. cornstarch; Homemade rough puff pastry or 1 (18-ounce) package frozen puff pastry; 1 large egg, lightly beaten; 1 large egg yolk, lightly beaten; Black or white untoasted sesame seeds, for topping