Preheat oven to 350 degrees.
Cook bacon in large skillet until crispy. Remove from pan and crumble. Put aside.
Saute onion in about 1 Tbsp of bacon drippings until clear.
Sprinkle cheese on bottom of pie plate. Top with bacon and onions.
Combine evaporated milk, eggs, salt, pepper and nutmeg in small bowl until well blended. Carefully pour into pie shell.
Bake for 30-35 minutes or until knife inserted halfway between center and edge comes out clean. Cool for 5 minutes on wire rack before serving.