Combine 1/2 tsp of the browning for gravy and Worcestershire sauce in small cup and brush over all sides of roast.
Combine remaining 1/2 tsp browning for gravy, mushroom gravy mix, onion soup and water in bowl.
Spoon one third of gravy mixture into bottom of cooking bag suitable for microwave ovens.
Place roast in bag on top of gravy mixture.
Spread with re maining gravy mixture.
Place in 12x8x2" (2qt.) glass baking dish.
Tie bag together loosely with string, leaving a space for escape of steam.
(Do not use metal twist ties.) Microwave at medium setting (50 percent power) 38 minutes.
Turn roast over.
Microwave at medium setting (50 percent power) 37 more minutes.
Let stand in dish on wooden board or heatproof surface 20 minutes.
Remove roast from bag.
Slice thinly and arrange on serving platter.
Spoon some mushroom gravy over slices and pass remaining gravy.