Step 1

Add ground beef and onion to the Instant Pot. Using the display panel select the SAUTE function.

Step 2

Brown the meat until no pink remains. Drain and discard liquids.

Step 3

Spread beef in the bottom of an IP-friendly casserole dish, sprinkle with salt, then layer spinach (if using) and shredded cheese.

Step 4

In a medium bowl, whisk together baking mix, milk and eggs to form a thin batter. Pour evenly over the meat and cheese. Cover loosely with foil--do not seal.

Step 5

Rinse out the pot, then pour in one cup of water and insert the steam rack. Carefully lower the casserole on to the steam rack.

Step 6

Turn the pot off by selecting CANCEL, then secure the lid, making sure the vent is closed.

Step 7

Using the display panel select the MANUAL or PRESSURE COOK function*. Use the +/- keys and program the Instant Pot for 20 minutes.

Step 8

When the time is up, let the pressure naturally release for 5 minutes, then quick-release the remaining pressure.

Step 9

(Optional) Sprinkle additional shredded cheddar and set under the broiler for 3 - 5 minutes until cheese is bubbly.

Step 10

Allow the casserole to set up for 5 - 10 minutes for easier serving.