I don't have a recipe, but we usually can tell if they are ready by grabbing the horn and if it twists off the vine, it is usually ready. We did not plant this year, but we had some volunteer plants and so far so good. Three off and curing a bit before we will tear them apart to make filing for pies like you. We bake until soft, mash and freeze. We don't add anything to them, just season to taste later. I'm interested in how others do this too.