Glad you like the leaves! Raw, they're a bit fuzzy for sure. I've boiled them and flowers to get broth for wine making and the boiled leaves lose the fuzziness plus they taste a lot like squash with the flowers. Add a bit of butter and you're good to chow down. I've got two varieties and one has leaves nearly three times the size of my hands, suitable for wrapping just like grape leaves for Mediterranean style or corn husks for Mexican style. They soften up when cooked though, really soft!
They contain trace amounts of salicylic acid - raw aspirin and coumarin - raw coumadin or warfarin, an anticoagulant or blood thinner. Dried, they make a mild pain relieving tea. I've dried them and mixed with dried Mullein at 60%, dried Spearmint or Peppermint at 10%, 'choke leaves at 10% and pipe tobacco at 20%, all by rough volume measurement for a decent pipe smoke. For spits and giggles I pan fried some in olive oil - meh. They tasted like olive oil so if I was going to do that regularly I'd add some herbs or spices to give them flavor. Pan fried they got super crispy and actually melted in my mouth. I haven't tried pan fried flowers though the one variety I have has very tender flowers, tender enough to toss raw in salads. The other variety's flowers are quite tough.
As far as I can find, the leaves and flowers don't contain Inulin, the fart ingredient.
Dealing with the farts from the tubers, there are four ways to convert the fiber Inulin into mostly fartless fructose; freezing, fermenting, cooking in an acidic ingredient or slow cooking for around an hour.
If you want them chipped raw in salads, either toss them into the freezer for a week or so, or if your winters are cold enough to freeze them, dig them when the ground thaws. Get them before they start to sprout, when they start to sprout the flavor goes 'off'.