Beef Tenderloin with Marsala

Yield:	6 Servings
Categories:	Italian, Beef, Pork

3	ts	Butter, plus 3 T, melted
2	oz	Sliced pancetta (Italian dry-cured unsmoked bacon OR
2	oz	Bacon
1		Onion, thinly sliced
6		1 Inch Slices (about 2 1/4 Lbs.) filet mignon
		Salt and pepper to taste
3/4	c	Dry Marsala
1/2	c	Beef stock