Couscous
Reliable1 cup medium bulgur with 2 cups boiling water = 1 cup couscous with 1 cup boiling liquid, off the heat 5 minutesBoth are steeped wheat products, but couscous is pre-steamed semolina and needs only half the water and a fraction of the time.
Trade-offSofter and paler with far less chew. In a tabbouleh it goes slightly pasty where bulgur stays distinct.
Allergen checkCouscous is a wheat product, so this exchanges one gluten grain for another. It is not a solution for coeliac disease — quinoa is. Read the packet rather than assuming, and treat a medical diagnosis as such.