Cantonese Pork

This is a delicious, and easy meal. Make s for a good "chinese night" I usually serve this with a chinese chicken salad.

2 pork tenderloins (about 2 lbs.)
1 Tbsp. vegetable oil
1 can (8oz) pineapple chunks in juice, undrained
1 can (8oz) tomato sauce
2 cans (4oz each) sliced mushrooms, drained
1 medium yellow onion, thinly onions
3 Tbsp brown sugar
2 Tbsp Worcestershire sauce
1 1/2 tsp. salt
1 1/2 tsp. white vinegar
Hot cooked rice

1-Cut tenderloins in half lengthwise, then crosswise into 1/4 in. thick slices. Heat oil in a large nonstick skillet over medium-low heat. Brown pork on all sides. Drain and discard drippings.
2-Place pork, pineapple with juice, tomato sauce, mushrooms,onion, brown sugar, Wocestershire, salt, and vinegar in slow cooker
3-Cover; cook on HIGH 4 hours or on LOW for 6 to 8 hrs. Serve over rice.