pork tenderloin

(ours was 2.5 lbs and I cut the seasoning in half, but still put 1 c. water in)
Ingredients:
5 pounds pork tenderloin
1 teaspoon salt
1/8 teaspoon garlic salt
1/8 teaspoon seasoning salt
dash black pepper
1/2 teaspoon rosemary
1 cup water

Directions:
Place pork in roasting pan. Make seasoning by mixing together salt, garlic salt, seasoning salt, pepper and rosemary. Lightly sprinkle seasoning mixture over pork. Cook in preheated oven at 350 degrees for about 30 minutes or until brown, then add 1 cup water. Cover with foil and cook for another 1 1/2 hours at 225 degrees. Pull out of oven and let sit about 10 minutes before slicing.

To make gravy, drain meat juices into pot. In a bowl, mix together 1/2 cup water and cornstarch until smooth. Slowly add to pork juices, stirring constantly over medium-low heat. To thicken gravy, add more cornstarch mixture until gravy reaches desired consistency.