Take two 12-14 inch pieces of tin foil and lay them in a criss-cross. Dump out the meatloaf into the center of the foil and finish shaping the loaf. Roll up the edges of the foil to create a little sided pan. Place this pan onto your trivet, or use a sling of foil, and place on top of the vegetables in the pot. Lock on the lid and set manual/pressure cook to 35 minutes.