Vegetable oil
Salt and pepper
3 pounds combined beef shank and oxtail pieces
2 onions, quartered
2 ribs celery, halved
2 carrots, halved
3 cloves garlic
1 bunch parsley
1 teaspoon black peppercorns
2 quarts water

Cooking Recipe:

Place pressure cooker over high heat. Oil and salt the oxtail and shank pieces then sear in batches. Add remaining ingredients and cover with water, being careful not to fill above the cookers "maximum fill" line. (If your pressure cooker does not have a water line, fill the pot 2/3 full). Bring to a boil and skim off any foam that gathers at the surface. Cover and lock lid. Once pressure builds up inside the cooker, reduce the heat so that you barely hear hissing from the pot. Cook for 50 minutes.

Release pressure using your cookers release device (read that manual) or cool the cooker by running cold water over the lid for 5 minutes. Carefully opening the lid and strain squeezing the solids before feeding to the compost pile, or the dogs. Strain through a fine sieve or several layers of cheesecloth. Season and serve or use as a base for other soup recipes.

1/2 teaspoon onion powder
1/2 teaspoon garlic powder
1/2 teaspoon freshly ground black pepper
1/2 teaspoon kosher salt
1 pound ground chuck
8 (3-inch) buns or rolls, split in half
2 to 3 tablespoons mayonnaise

Cooking Recipe:

Preheat the oven to 250 degrees F. Preheat a griddle to 350 degrees F.

Combine the onion powder, garlic powder, pepper, and salt in a small bowl. Set aside.

Line a jellyroll or sheet pan with parchment paper, and place the ground chuck in the middle of the pan. Cover the meat with a large sheet of plastic wrap. Roll meat with a rolling pin until it covers the surface of the pan; it should be very thin. Remove the plastic wrap, and sprinkle the meat with the seasoning mixture. Fold the meat in half, from side to side, using the parchment paper. Use a pizza wheel to cut the meat into 8 even squares.

Wrap the buns in foil and place in the oven for 5 to 10 minutes. Meanwhile, place the burgers on the griddle and cook for 2 to 3 minutes per side.

Remove the buns from the oven. Spread a small amount of mayonnaise on each bun and top with the burger and any other condiments, as desired. Serve immediately.