Roast Pork Tenderloin

2 slices bacon
1 to 1 1/2 pounds pork tenderloin
1/3 cup chopped onion
1 tablespoon butter or margarine
1 can (8 ounces) tomato sauce or spaghetti sauce
3 tablespoons chopped sweet pickle or sweet pickle relish
2 tablespoon vinegar
1 teaspoon dried parsley flakes
1 teaspoon sugar

In a saucepan over medium-low heat, melt butter. Cook chopped onion in butter until tender; add tomato sauce, sweet pickle, vinegar, parsley flakes and sugar. Simmer, uncovered, for 10 minutes.

To Freeze: Freeze in a freezer safe container with sauce separated.

To Reheat: Arrange bacon slices over pork tenderloin. Place tenderloin on rack in a shallow roasting pan. Tuck thin end of meat under. Roast, uncovered, at 350° for about 25 to 35 minutes, or until internal temperature is around 160°.Serve sauce with roasted pork tenderloin.