Zephyr is a squash that is yellow and green at the flower end. A vendor at the farmer's market recently told me that it is a mix of yellow crook neck squash and zucchini. If you prefer Ritz Cracker crumbs, they could easily be substituted for the bread crumbs. I'm thinking of adding a dash or two of Tabasco sauce. We loved it without the Tabasco, but it might be fun to kick it up!!!