If you wait to harvest your squash until it is gigantic, the skin will be really thick, and the proportion of seeds to squash “flesh” will be unfavorable. The seeds will be really big, and the taste and texture will not be as good as the small squash. Use those to make zucchini bread or cheesy zucchini muffins! Scoop out the seedy center, then grate the squash to use in your favorite baking recipe.