Rub salt and pepper all over pork. Cover and chill overnight.
Preheat oven to 350°. Heat a large ovenproof pot over high heat and pour in oil. When hot, add pork. Brown pork on all sides until well browned (about 4 minutes per side), adjusting the heat to keep the pork sizzling but not burning. Transfer pork to a plate or platter.
Reduce heat to medium and add wine and lemon juice, scraping up browned bits. Add broth, garlic, and chiles. Return pork to pot and bring liquid to a boil. Cover pork and bake in oven until tender when pierced with a fork, about 2 hours.
Quarter, core, and peel pears. Add pears to pot, cover, and bake until pears are cooked through, about 30 minutes. Serve hot, with pan juices.
Note: Nutritional analysis is per serving.