Pork Tinga

red potatoes, cut into 1/2 inch cubes

lbs. pork butt (pork shoulder), trimmed of fat and cut into 1-inch chunks

of diced fire roasted tomatoes

canned chipotle chiles en adobo, diced

chipotle canning sauce (from the chipotle chiles in adobo)

Worcestershire

dried oregano

garlic, minced finely

large white onion, halved and cut into 1/4 inch slices

Salt

{For serving: tortillas, queso fresco (or feta), fresh avocados (sliced lengthwise)}