Preheat oven to 350F. Boil squash with onion in salted water until crisp. Drain. Add tomatoes, cheese, salt and pepper. Place in greased casserole baking dish 8 x 8 or 7 x 1l inch. Bake for 30 minutes at 350F. Cover with buttered bread crumbs before baking.
Cajun Country -- New Iberia, Louisiana