vegetable oil • pork shoulder, cut into 3/4-inch cubes (about 1.5 kg) • fresh orange juice (about 710 ml) • guajillo chiles, mild, seeded and soaked (about 100 grams) • vinegar (about 240 ml) • garlic, peeled • achiote paste (about 50 grams) • Salt, to taste • Salsa • red onion, sliced • habanero chiles (or to taste), sliced • sour limes, juiced •