Prepare the tomatillos: Remove the husks from the tomatillos and rinse them under cold water.
Roast the tomatillos and garlic: Cut the tomatillos in half and arrange them, cut side down, on a baking sheet lined with foil. Add the unpeeled garlic cloves to the same sheet. Broil for 5-7 minutes until lightly charred. Allow to cool.
Blend the sauce: Transfer the roasted tomatillos and garlic to a blender, add chopped jalapeños and cilantro, and blend until smooth.
Brown the pork: Season pork cubes with salt and pepper. Heat olive oil in a pan and brown the pork on all sides. Remove and set aside.
Sauté the onions and garlic: In the same pan, add chopped onions and minced garlic, cooking until softened.
Combine ingredients: Add browned pork back to the pan, stir in oregano, tomatillo sauce, chicken broth, and a pinch of ground cloves. Season with salt and pepper.
Simmer the chili: Bring to a boil, then reduce heat and simmer uncovered for 2-3 hours until pork is fork-tender.
Serve: Serve hot with Spanish rice and warm tortillas.
