I used 4 large potatoes (11 oz / 311 g each). Peeled or unpeeled is your choice. You can use less or more potatoes but do not go over the ⅔ full limit in your size of pressure cooker.
Scrub your potatoes for unpeeled, or peel, totally your preference. Cut the potatoes into bite size pieces, how I do this is cut a potato in half lengthwise through the widest section, lay each piece cut side down then make 1 or 2 cuts lengthwise, then cut crosswise to make bite size pieces. Takes about 3 seconds to cut up a potato this way. Make sure the pieces are not to small.
Add the water to your pressure cooker, add the bay leaf and garlic if using, insert the steamer tray or basket, add the potatoes to the tray or basket.
Place the lid on and lock, add the weight (the jiggler), turn on the heat to high. when the jiggler starts to move and vent pressure, indicating full pressure, start your timer for 4 minutes and reduce the heat to low or medium low to maintain full pressure. If you want a bit firmer potato pieces, set your timer for 3½ minutes.
When 4 minutes have passed, turn off the heat and move the pressure cooker to an unused burner to cool and release the pressure naturally, about 10-15 minutes.
When the pressure is fully released, open the lid.
Use the potatoes in any recipe calling for cooked cubed (bite size) pieces. I used these for a slow cooker recipe.