Soften the raw, unsalted cashews either by soaking overnight, or the easier method, allowing them to sit in a small pot of boiling water for about 10 minutes.
In a medium-heat pan, saute (diced) onions for about 5 minutes until translucent and lightly browned.
Boil a pot of water and cook pasta per package instructions.
In a blender, blend all of the ingredients listed under the Pasta Sauce until well-mixed and smooth.
In a medium-heat pan, saute the sliced mushrooms until the liquid has been cooked out of them, 5 - 10 minutes. Add in the "chicken" strips and continue cooking for another 5 minutes.
Add pasta sauce to pan, and cook on low-heat for another 5 minutes.
Add in noodles and serve!