1 lb Lean flank steak
1/2 c Onion; chopped
1/2 c Tomatillo salsa
1 ts Hot sauce
1/4 ts Chili powder
4 Flour totillas (10 inch)
Vegetable cooking spray
1 ts Chili powder
1 c Shredded lettuce
2 c Tomato; seeded, diced
1/2 c Nonfat sour cream alternativ
1/2 c Mock Guacamole
1/4 c Green onions; sliced