Step 1

Put a layer of the sliced potatoes in the bottom of a 7" x 3" oven safe dish (or a size close to that). Stainless steel is my choice.

Step 2

Sprinkle on a pinch each of the salt, pepper, garlic powder, onion powder, thyme leaves.

Step 3

Add another layer of potatoes.

Step 4

Repeat step 2 (layering on the spices).

Step 5

Sprinkle on half of the parmesan cheese.

Step 6

Add another layer of potatoes.

Step 7

Repeat step 2 again.

Step 8

Sprinkle on half of the shredded Monterey Jack and sharp cheddar cheeses (not the parmesan).

Step 9

Add another layer of potatoes.

Step 10

Repeat step 2 with the remaining spices, and all of the ¼ tsp nutmeg.

Step 11

Gently pour over the half and half (if you can't see the liquid just peeking through the potatoes, add just a little more. You don't want it too wet or covering the top layer, but you want it to be creamy!).

Step 12

Top with remaining Monterey Jack and sharp cheddar cheeses (if you are not intending to broil and crisp up the top after pressure cooking, add the remaining parmesan cheese as well. Otherwise, reserve it for the end).

Step 13

Add 1 ½ cups of water to the inner stainless liner of the Instant Pot.

Step 14

Cover the dish with foil, or lid, and set dish on a trivet with handles, and lower it into the pot.

Step 15

Put the lid on the Instant Pot and close it, setting the steam release knob to the Sealing position.

Step 16

Choose the Manual (or Pressure Cook) setting on the pressure cooker and use the +/- button to choose 40 minutes (45-55 for thicker slices). Make sure High Pressure is also selected, if you have the option.

Step 17

When cooking cycle ends, do a Quick Release of the steam and open the lid after the pin drops.

Step 18

Very carefully peel off the foil or remove lid from pan. The steam will be super hot, so be careful! Test for doneness, using a fork. The fork should slide into the potatoes easily. If not, cover them back up and set for a few more minutes.

Step 19

When done, use silicone mitts, or pot holders to grasp the handles of the trivet and carefully lift it out of the pot and onto a countertop or other stable surface.

Step 20

Turn on broiler to 375 degrees F. and place the oven rack about 6 inches from element. Place dish of scalloped potatoes on a baking sheet.

Step 21

Sprinkle the remaining parmesan cheese over the top of the potatoes. Add a little more if you like it crisper.

Step 22

When broiler is hot, place baking sheet with dish under the broiler for about 5 minutes, or until desired browning is reached. Just watch it to be sure it doesn't get too browned.

Step 23

Serve hot!