Vegan cattail recipes:
Cattail-Wild Rice Pilaf
This recipe can be made with brown rice, but the wild rice adds a special dimension to it.
1 cup dry wild rice (4 cups cooked)
2 Tbsp sesame oil
½ cup chopped green onion
2 cups cattail shoots, sliced (about 30 cattails)
2 tsp salt
½ cup slivered almonds
1. Cook the wild rice until tender.
2. Sautee onion and cattail shoots in sesame oil until tender and translucent.
3. Mix the rice and the sautéd cattail shoots and onion together.
4. Add salt and slivered almonds.
5. Serve hot.
Source: http://wildfoodplants.com
Cattail Wild-Rice Soup
1 cup dry wild rice (4 cups cooked)
2 Tbsp sesame oil
½ cup chopped green onion
2 cups cattail shoots, sliced (about 30 cattails)
2 tsp salt
1. Cook the wild rice until tender.
2. In a heavy-bottomed soup pot sauté onion and cattail shoots in sesame oil until tender and translucent.
3. Add the cooked wild rice, salt and 4 cups of chicken broth or other soup stock of choice.
4. Simmer together for 15-20 minutes and serve.
Source: http://cattails.info/Cattail_Recipe.html
Pedagogy of the Plants 
Thanks for visiting Irresponsibility. I’m intrigued by this recipe – had no idea cattails were edible!