Kasha Kreplach with Toasted Garlic Challah Crumbs

This will probably make more kreplach than you need for this dinner, but it is difficult to prepare less than one cup of kasha (since it is mixed with a whole egg). And leftover kreplach (uncooked) can be frozen. Arrange them, unwrapped, in a single layer on a baking sheet, place in the freezer until solidly frozen, then wrap in freezer packaging. You can also use the filling to make “lazy kreplach:” boil the wonton wrappers as you would pasta squares and drain them. Grease a rimmed baking