Steaks with a mustard cream sauce

This recipe is from my 60 minute gourmet cookbook. One of my favorites. (french cooking made easy)

4 or 6 Sirloin steaks or any tender cut steaks
salt and pepper
2 TB cooking oil
2 TB butter
2 TB finely chopped shallots
1/2 cup cognac
1 1/2cups heavy cream
1 TB Dijon mustard

Sprinkle steaks with salt and pepper. Heat oil in skillet to almost smokig. Cook steaks in very hot skillet to desired doneness, browning sides. Remove steaks to a seving platter to keep warm. Pour off fat, and Add butter and shallots to the skillet, Add cognac and ignite it. after flame is gone, Add cream and bring to a boil, stirring constantly,about 5 minutes. remove from heat and stir in mustard. Serve sause with steaks.