Blind bake the pie crust. See notes above for details.
In a skillet, cook and crumble sausage until it's no longer pink. Drain excess fat from the pan.
Cut cream cheese into cubes and add to the pan with the sausage along with 10-ounces of drained diced tomatoes and green chiles. Stir until cream cheese melts.
Cool mixture about 5 minutes then stir in beaten eggs. Add a pinch of salt and pepper, if desired.
Pour sausage mixture into pie crust.
Spread cheddar Colby cheese evenly over the top.
Bake quiche 30 to 35 minutes or until crust is brown and center of the quiche is slightly jiggly.
Remove from the oven and cool for 5 minutes before cutting.