Sprinkle all of the jack cheese & half of the cheddar over bottom of partially baked crust. (I use "deep dish" frozen crust.) Sprinkle chiles over cheese. Beat eggs with half & half and salt, pour into crust. Sprinkle remaining cheddar over top.
Bake at 325 degrees for 40 minutes or till center of quiche is set. Insert knife in center to test.
Let stand 15 minutes before cutting. Serve warm or cold.