Step 1: Brown the Pork: First things first, grab that pork roast and cut it into lovely 1-inch cubes. Sprinkle them generously with salt and pepper. Now, heat your olive oil in a large, heavy-bottomed pot or Dutch oven over medium-high heat. Once it's shimmering, add your pork cubes in batches, making sure not to crowd the pot. You want to get a gorgeous brown crust on all sides – this is where so much flavor comes from! Once browned, take the pork out and set it aside.
Step 2: Sauté Aromatics: Don't clean that pot! All those browned bits are flavor gold. Toss your diced yellow onion into the same pot and cook, stirring occasionally, until it's softened and turns translucent, about 5-7 minutes. Then, add your minced garlic and cook for just another minute until you can smell its wonderful fragrance. Be careful not to let it burn!
Step 3: Simmer the Chili: It's time to bring our flavors together! Return the browned pork to the pot. Stir in the roasted green chilis, tomatillo salsa, cumin, Mexican oregano, and that tiny pinch of ground cloves. Pour in 6 cups of chicken broth, give it a good stir to combine everything, and bring it to a gentle simmer. Once it's bubbling ever so gently, reduce the heat to low, pop on the lid, and let it cook for 1.5 to 2 hours, or until that pork is incredibly tender. This is where the magic happens and the flavors meld beautifully! This part is mostly hands-off, making it a perfect candidate for an easy weeknight meal where you can set it and forget it.
Step 4: Cook the Potatoes: Once your pork is tender, it’s potato time! Add your cubed potatoes to the pot. If they're not mostly submerged in the liquid, go ahead and add the remaining 1 cup of chicken broth. Cover the pot again and continue to simmer for another 20-30 minutes, or until the potatoes are fork-tender.
Step 5: Thicken and Finish: Now for that perfect, velvety texture. In a small bowl, whisk together 2-3 tablespoons of masa flour with a few tablespoons of water until you have a smooth slurry – no lumps allowed! Slowly stir this slurry into your chili. Continue to simmer for 5-10 minutes, stirring occasionally, until the chili has thickened to your liking. It will cling beautifully to a spoon! Just before you serve up this amazing chili, stir in the fresh juice from your lime. This really brightens all those rich flavors!