Corned Beef & Cabbage with shells

1 corned beef brisket (including seasoning packet) 12 flour tortillas or 12 corn tortillas or 12 crisp taco shells, warmed 3 cups shredded cabbage or 3 cups[...]

1 (9 inch) pie crusts 1 cup green cabbage , cooked, well drained 1 tablespoon butter 1/2 cup onion , chopped 1 cup half-and-half 2 large eggs 1/4 cup parmesan[...]