I recently went gluten-free and am attempting my first buckwheat-based salad. I bought toasted buckwheat at my health food store in the bulk section, and, based on internet research, I thought that I was supposed to cook it for 15 - 20 minutes, 1 parts buckwheat to 2 parts water. After less than 5 minutes, most of it was a mushy, oatmeal-like texture. Is this normal? Could I possibly have gotten an instant buckwheat? Did I do something wrong.