Instant Pot Pork and Green Chile Tamales

Name: Instant Pot Pork and Green Chile Tamales
Ingredients: 3/4 lb. (750 g) boneless pork shoulder, cut into 4-inch (10-cm) cubes; Kosher salt and freshly ground pepper; 2 Tbs. canola oil; 1 yellow onion, diced; 1 tsp. ground cumin; 1 tsp. garlic powder; 1/2 cup (4 fl. oz./125 ml) chicken broth; 1 can (4 oz./125 g) diced green chiles; 1/4 cup (1/4 oz./7 g) fresh cilantro leaves, finely chopped; 4 cups (1 lb./500 g) corn masa mix (masa harina for tamales); 2 tsp. salt; 1 1/2 tsp. baking powder; 4 cups (32 fl. oz./1 l) water; 2/3 cup (4 oz./125 g) solid vegetable shortening, melted; 16 large corn husks, soaked in water to cover for 1 hour