Pork Loin in Mustard Sauce

Yield:	8 Servings
Categories:	Mexican, Pork

4	lb	Lean pork; boneless
1/2	c	Prepared mustard
1	cn	Tomato puree; (6-ounce)
3		Garlic cloves; minced
1	c	Onion; chopped
2/3	c	Olive oil
2/3	c	Water
1	c	White wine
1		Bay leaf
2	tb	Cornstarch mixed with 4 T water