RINSE. Lentils well, set aside.
CHOP. Slice off the leek's dark green end, trimming to the part where the color is a pale green. Chop leeks and place them in a bowl of water and swish to remove any dirt. Strain. Chop all remaining vegetables.
PREPARE. Gather remaining ingredients.
SAUTE. Set your pressure cooker to the saute setting on low, add grape seed oil, and wait a few minutes for it to warm up. Add onions and a bit of salt and saute until softened (2-3 minutes). Add leeks and bay leaves, saute another minute. Add garlic and tomato paste, saute until it becomes fragrant. Do all of this without the lid on the pressure cooker, so you can stir often.
PRESSURE COOKER. Set your pressure cooker to the pressure setting on high and manually set timer to 15 minutes. Then add broth, 1-cup of the water, remaining vegetables, seasonings, salt and pepper. Close lid. It will beep when it is sealed and will start to build pressure. The timer will start once the pressure cooker has built up enough pressure, about 5 minutes.
ADD. Once the timer rings and you have released all the pressure, open lid away from you to avoid burning yourself. You may want to add more water or broth. We like it on the thicker side, but you may want it a little more soup like. Add acid of choice, like apple cider vinegar or lemon juice and stir in.
TASTE. Adjust, if necessary.
SERVE. Garnish with fresh parsley.