Inulin is a form of dietary fiber extract commonly from chicory root but occurs naturally in other vegetables such as artichokes, asparagus, onions, garlic, raisins and bananas. Inulin is now being added to foods to increase the fiber content. It dissolves easily in water or other liquid so it can be added to almost any food preparation.
Look for inulin powder in your local drug store, Walmart Stores, and Whole Foods Market or buy online at Amazon.com: Certified Organic, Non-GMO, Inulin Powder.
If you don't have inulin powder you can substitute: