I'm trying some English lavender this year, but I'm beginning with a start I got at a nursery. My mom has grown it before in our yard, and it pulled a disappearing act - not sure why. I would love to try French lavender, if I can ever find some.
I've had lavender buds in homemade marshmallows, but I prefer it more for its aromatherapeutic properties. Lavender can help with depression, which is something I'm prone to. I usually just use the dried buds in a sachet, but I also like sprinkling some in hot chocolate
Lavender creme brulee is fabulous. (I've never made it myself but have had it at a restaurant) It also can be used in jams/jellies. If I remember correctly, I saw a champagne lavender jelly that sounded really good.
I don't have anything to help on growing it though. It's on my wish list for when we can landscape our front yard. (especially now that we have bees, they LOVE lavender)