To make roasted garlic, preheat oven to 400 degrees F. Cut the top of a head of garlic off. Wrap the exterior the the garlic head with aluminum foil, making sure not to cover the top. Drizzle the top with 1/2 tsp olive oil and place the garlic directly on the middle rack in the oven. Bake for 30 to 40 minutes.

In the bottom of an Instant Pot, add sliced potatoes. Cover with water and stir in 1 teaspoon salt.

Seal the top and make sure the valve is set to "seal."

Cook on High manual pressure for 8 minutes. Quick release pressure when the timer goes off.

Drain potatoes and return them to the Instant Pot. Mash potatoes to desired consistency. We like them a little more chunky instead of completely smooth.

Stir in remaining salt, pepper, half-and-half, butter, Parmesan, and roasted garlic. Serve warm with a garnish of chopped parsley.

Serve warm with gravy.