Pork Loin in Green Sauce

A Mexican-style pork loin slow-simmered tender in herb-scented water, then sliced and finished in a vibrant green sauce built from tomatillos, tomato, roasted green chiles, cilantro, and garlic. The technique is unusual: poach the pork first to break down the connective tissue, then introduce it to the sauce only at the end so the salsa stays bright.

The 3-hour simmer is essential. Pork loin is lean and tough by nature; the long, gentle cook in seasoned water (with onion, bay leaf, marjoram, thyme) tenderizes the meat without drying it out. Salt goes in at 90 minutes, not earlier, to prevent the proteins from tightening and the meat from staying tough.

Frying the green sauce paste before adding the cilantro and stock is the technique that separates this from a quick salsa verde. Five minutes of hot oil deepens the flavor of the tomatillos and chiles, mellows the raw garlic, and creates a thicker, glossier sauce.

Add cilantro at the end. Cooking it for the full 30 minutes turns it gray and bitter; stirring it in at the last minute keeps the flavor fresh and the color vivid green.

Chef Tips

• Char the green chiles directly over a gas flame or under the broiler until blackened all over. Wrap in plastic 10 minutes, then peel; the steam loosens the skin.
• Reserve the poaching liquid. The recipe calls for a cup of meat stock, but the surplus freezes for future soups and braises.
• Slice the pork against the grain into thin medallions for the most tender bite. Thicker chunks work, but lose elegance.
• Taste the sauce and adjust acid: a squeeze of lime at the end brightens it noticeably if it tastes flat.

Variations

• Use bone-in pork shoulder for an even richer, more forgiving cut; add 30 minutes to the simmer.
• Stir in a small handful of toasted pumpkin seeds (pepitas) blended into the sauce for traditional pipián-style depth.
• Swap green chiles for poblanos for milder smokiness, or add a chopped serrano for extra heat.