Pressure Cooker Beef Bone Broth

My grocer sells beef bones in the freezer area- $1.99 a pound (which I'm not sure is a great price).  Try to get pastured/grass fed beef bones.

Method:
Put beef bones in roasting pan. Coat with tomato paste. (next time ifI don't have tomato paste I may try a little brown sugar and or oil? I think the point is to help the beef bones carmelize)

Bake/roast in 400 F oven for an hour. It will smell delicious.

Transfer roasted bones to pressure cooker.  Pour hot water into the roasting pan and scrape up the bits, pour into the pressure cooker. Add more water to cover. Usually want to fill 1/2 to 2/3 of the pressure cooker with liquid for broth- follow the manufacturer's instructions (i.e. don't overfill)

Add:
black peppercorn
bay leaf
celery
parsley
carrot
onion 
garlic

Bring up to pressure. Cook over pressure for 25 minutes.

Strain. Pour into containers.  I like to refrigerate first, which makes it easier to scrape off the fat.  Then you can freeze for later use.