Place a skillet over medium heat. Once hot, add the chicken sausage and cook until browned.
Whisk together the eggs and milk and add to the skillet with the sausage. Add half the scallions and scramble the eggs until cooked through. Remove from heat and set aside.
Spread 2 tablespoons of refried beans on each toasted tortilla.
Top each tortilla with an equal amount of the egg and sausage scramble, grape tomatoes and avocado.