Season the pork with one teaspoon of sea salt, ground pepper, and 1 tablespoon of cornstarch. Toss to coat.
Heat a pot with oil. Add the pork, and sear for 2 minutes or until brown on both sides. Remove from the pot and set them aside.
Use the same pot, and add more oil if it starts drying. Add the onion and saute until tender or translucent. Add the garlic and continue sauteing until aromatic.
Add the carrots, celery, potatoes, and season with smoked paprika, dried thyme, red chili pepper flakes, and the rest of the salt. Constantly stir until well combined.
Add the diced tomatoes, brown sugar, pork, beef broth, and slurry (mix one tablespoon of cornstarch and 1/4 cup of water). Stir to combine, lower the heat, cover, and simmer for 35-45 minutes or until the pork is tender.
Garnish with parsley.