Set your pressure cooker to the saute setting
Make Marsala wine sauce. Add olive oil, garlic, Italian seasoning, shallots, and mushrooms the pressure cooker and saute until the mixture turns into a sauce.
Add Pork Loin roast to your pressure cooker and seer ever so slightly on each side.
Add water to your pressure cooker and seal the lid.
Cook on high pressure for 25 minutes.
Release pressure and open lid
Make sure that the temp of the pork is at least 145 degrees.
Remove the Pork from the pressure cooker, place on a serving plate and drizzle the sauce on top. Cut into slices and serve.