Melt 1 tbsp butter in medium skillet over medium heat. Add eggs and cook stirring, until eggs are just set but still a little wet. Remove from heat and set aside. Melt remaining butter in large skillet over medium low heat.
Put one tortilla in skillet, then spread scrambled eggs, chorizo and cheese on top. Top with remaining tortilla. Cook until cheese melts and tortilla is lightly browned, turning once about 3-4 minutes on each side. Cut into wedges and garnish with avocado, sour cream and salsa.