Preheat the oven to 350ºF. Cook pasta according to package instructions.
While pasta is cooking, prepare the sauce. Drain and rinse the cashews, then add them to a blender along with the remaining ingredients, starting with just 1/3 cup of water.
Blend on high until smooth and creamy, adding more water 1 tablespoon at a time until the sauce is pourable. Taste and adjust seasonings as needed.
Drain the pasta and add it to a oven safe baking dish. Pour sauce over top and stir to combine.
Sprinkle breadcrumbs over the top of the noodles, cover the dish with tin foil and bake on the center rack for 20 minutes. Remove and serve immediately.
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Notes
If you have a high powered blender, you can get away with soaking the cashews in hot water for 30 - 45 minutes.