To make fry bread, mix dry ingredients. Stir in water. Knead dough lightly; cover and let rest 15 minutes. Heat skillet sprayed with non-stick cooking. Separte dough in half and pat dough into thin 8" circles. In the hot skillet, quickly brown both sides. To make filling, brown ground beef and onion, drain. Add beans and garlic salt. Simmer 10 - 15 minutes. To serve, sppoon filling into frybread. Top with grated cheese, salsa, lettuce, tomatoes, and onion.