DO NOT use an electric whisk - you will end up with spongy fettuccine.
A silicone baking sheet helps spread out the mixture more evenly, which would be difficult on non-stick parchment paper.
The mixture should be viscous and stay in place when you spread it. If it's too liquid, add a little more lupin flour.
If you bake it in an oven tray, rather than on a baking mat placed on top of an oven rack, make sure it is completely flat bottomed, otherwise the liquid mix will collect in the middle concave.
Cooking time varies depending on how thinly you manage to spread the mix.
Once air-dried, you can store these fettuccine in the fridge, covered, where they will keep for 3-4 days. They can also be frozen in zip-lock bags.
Metric kitchen scales are an inexpensive yet invaluable gadget to enable accurate measurement of ingredients. Store them upright in a cupboard or over your worktop and they'll only take up a tiny bit of space. Click
HERE for the ones I use. For U.S. option click
HERE.