1. Preheat oven to 375°F.
2. Butter a baking dish (2 qt casserole dish or 8x8 should both work).
3. Dust the dish with about 1/4 cup dried breadcrumbs - discard any extra that don't stick.
4. Bring a large pot of salted water to a rolling boil.
5. Add cabbage to boiling water, cook for 5 minutes.
6. Drain cabbage and gently press out as much water as possible.
7. Whisk together in a large bowl: eggs, milk, flour, salt, mustard, and pepper.
8. Mix in the 1/2 cup of cheese.
9. Stir in the cabbage.
10. Pour into the prepared baking dish.
11. Top with the 1/4 cup of cheese and 1 tablespoon dried breadcrumbs.
12. Bake for 40-50 minutes, until set and golden brown on top.