Easy Low Country Shrimp Boil in the Pressure Cooker

lbs red potatoes

to 3 ears of corn, cut in half

tbsp Old Bay seasoning

 teaspoon salt

to 1.5 lbs fully cooked sausage (cut into 2-inch pieces)

 lbs large fresh shrimp still in the shell (removing the heads is up to you)

water

optional cajun seasoning to sprinkle over top when serving