Keep this hearty Southwestern favorite in mind when you're expecting company, hosting a Super Bowl party, or just craving comfort food. Serve the smoky chili with cornbread or tortillas, diced white onion, pickled jalapenos, and sliced avocado. This recipe appears in our cookbook "Martha Stewart's Pressure Cooker" (Clarkson Potter).
Preheat broiler. Roast poblanos under broiler, turning, until completely charred, about 5 minutes. Transfer to a medium bowl; cover tightly with plastic wrap. Let sit 10 minutes. Using your hands, rub off most of charred skin, rinsing hands frequently under cold running water. Slice poblanos in half, and remove ribs and seeds. Finely chop chiles.
Heat 2 tablespoons oil in a 6- to 8-quart stovetop pressure cooker over medium-high, or in an electric pressure cooker set to saute. Season pork with salt and pepper. Add half the pork and cook, stirring occasionally, until browned, about 5 minutes; transfer to a plate. Repeat with remaining pork; transfer to plate.
Add remaining 1 tablespoon oil, the onions, and garlic to pressure cooker, and cook, stirring occasionally, until softened, about 6 minutes. Add cumin, oregano, bay leaves, and poblanos, and cook, stirring, until combined, about 1 minute. Add vinegar, stock (8 cups for stovetop; 7 cups for electric), beans, reserved pork along with any accumulated juices, and 1 teaspoon salt, stirring up the browned bits, and bring to a boil.
Stovetop: Secure lid. Bring to high pressure over medium-high heat; reduce heat to maintain pressure and cook for 26 minutes. Remove from heat, quickly release pressure (loosely cover vent with a clean kitchen towel), then remove lid.Electric: Secure lid. Manually set cooker to 31 minutes and let it come to pressure. Once time is complete, quickly release pressure (loosely cover vent with a clean kitchen towel), then remove lid.
Let pork and beans stand, uncovered, for 30 minutes in liquid. (Discard bay leaves.) Season with salt and pepper and serve.