In medium skillet, combine sausage, onion and bell pepper; cook over medium-high heat until sausage is browned. Drain.
In small bowl, combine eggs and milk; beat well. Add to sausage mixture. Reduce heat to medium; cook until eggs begin to set, stirring occasionally. Add cheese; mix lightly. Continue cooking until cheese is melted and eggs are set.
Remove from heat; spoon salsa over egg mixture. Serve immediately with additional salsa and warm tortillas, if desired.