First, get yourself a pressure cooker. Mine is just one from Wal-mart. It is nothing fancy, but it does the trick. Now, add the ribs and 1 and 1/2 cups of water into the cooker. That is all the water you will need to add during this entire process.
Once your lid is off, you just move your cooker back to the stove top. Add in your potatoes. Mom doesn't add carrots to hers, but I do and sometimes I even add in onions. There is no certain way to cut the potatoes. Just peel them and "hunk 'em up" as we say. Just cut them into chunks. You can fill your cooker almost to the top. You don't need to add in any more water. The water you had originally in there will be enough.
Now that your cooker is filled with the ribs and water you pressured before, potatoes, carrots, and onions, add in a bit of salt to taste. Put your lid back on the cooker and set the stove back on high heat. Wait about 5-10 minutes until it starts jiggling, turn the heat down to medium and allow the potatoes, carrots, and onions to cook for 5-10 minutes depending on how full your cooker was. I fill mine almost completely to the top so I allow them to cook for 10 minutes. When the time is up, just repeat the process of running water over the cooker to release the pressure. Now your meal is finished and should look something like the photo below.
My sweet cornbread smothered in butter is the perfect compliment to the meal.
Have fun and enjoy!
I shared this tutorial at Farmgirl Friday