Halve squash lengthwise. Remove seeds. Place squash, cut side down, in a large baking dish. Bake in a 350 degree F. oven for 50 to 55 minutes or until nearly tender.
Scoop out squash pulp to make 1/4-inch-thick shells. In a large mixing bowl combine squash pulp, spinach, the 1/3 cup Parmesan or Romano cheese, bacon, margarine or butter, green onion, salt, and red pepper. Fill the squash shells with the squash mixture. Combine the bread crumbs and the 1 tablespoon Parmesan or Romano cheese; sprinkle over squash.
Return filled squash halves to same baking dish. Bake, uncovered, for 25 to 30 minutes or until heated through. Makes 4 servings.