Great question — answering as the UphillTech team:
Pasta relies on gluten development for its strength and structure. Only wheat and its close relatives have the necessary precursor proteins, glutenin and gliadin, from which gluten is formed. You simply will not be able to make pasta from 100% oat flour using a recipe designed for wheat flour, as oats do not contain gluten (well, technically, its precursors). If you desire a gluten free pasta, you should search for recipes specifically for that purpose. They are often bound together with xantham gum or other hydrocolloids. If you are just looking for an interesting pasta as an alternative to the more traditional ones, you need to make sure you have enough gluten available to support the...
Full answer by SAJ14SAJ: https://cooking.stackexchange.com/a/42967 (CC BY-SA 3.0).
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