*To make your own achiote oil, combine 1/4 vegetable oil and 1 tablespoon of achiote seeds in a small pot. Cook over medium heat until fragrant and red, about 5 to 8 minutes. Carefully strain and discard achiote seeds.
Set a 6-quart Instant Pot to the sauté setting and allow to pre-heat. Meanwhile, season pork butt liberally with salt and pepper. Add achiote oil to the pot then carefully add pork butt and cook until browned, about 8 to 10 minutes, stirring occasionally.
Next add bell pepper, celery, yellow onion, garlic, hot chilis, cumin, oregano, bay leaves, and cilantro, along with a good pinch of salt, and sauté until cooked down and aromatic, about 5 to 8 minutes. Then add tomato paste and cook for 1 to 2 minutes until brick red.
Add the olives, chicken broth, and crushed tomatoes, and stir until well combined. Set Instant Pot to meat/stew setting for 35 minutes.
Allow steam to fully release before opening. Garnish with additional cilantro if desired and serve immediately.