In a small bowl, mix the oregano, chili powder, cumin, salt and pepper. Sprinkle all sides of the meat with the mixture and place in the instant pot.
2 teaspoons dried oregano, 1 tablespoon chili powder, 2 teaspoons ground cumin, 2 teaspoons kosher salt, 1 teaspoon ground black pepper, 5 pounds boneless pork shoulder
Place the onion and chilis in the instant pot. Then place the garlic, cut side down, on the meat.
1 onion, 1 head garlic, 3 serrano peppers
Pour the orange juice, lime juice, and coke over the meat.
2 oranges, 2 limes, 1½ cups Coca-Cola
Seal the instant pot and set the meat cycle for 90 minutes.
When the time has finished, let it slow release.
Open and place the meat on a cutting board or plate. Remove any pieces of fat and using two forks pull the meat apart.
Set the broiler to 500°F and cover a baking sheet in aluminum foil.
Place meat on the baking sheet. Spoon some of the broth over the meat. Place under the broiler till crispy, about 5 minutes. Stir the meat and crisp again.
Lower the oven to 375°F. Grab another baking sheet and line it with parchment paper.
Arrange half the chips on the sheet pan. Top with half the pulled pork and half the cheese.
8 ounces tortilla chips, 3 cups freshly shredded cheddar cheese
Layer on the remaining chips, pork, and cheese. Top with the green onions.
2 green onions
Bake for 10-12 minutes until the cheese is melted. Garnish and serve!
Optional Toppings: