The most common question a vegan gets asked: "Well then what do you eat?"
Cashew Alfredo Sauce
1/2 cup raw cashews
1 1/2 cups boiling water (best to use the starchy pasta-cooking water)
1 tsp fresh lemon juice
1-3 garlic cloves, to taste
1 tbl olive oil
2 tbl nutritional yeast
salt and pepper to taste

Place raw cashews in food processor and pulse until nuts are very fine. Carefully add in the boiling water; process until smooth. Add the lemon juice, garlic, olive oil and nutritional yeast; process again until smooth. Adjust seasonings with salt and pepper.
It's the blending process that the sauce thickens, which is why using starchy water is your best bet, so it takes a while. If it isn't thickening enough for you, heat it in a saucepan over a low temperature for a few minutes and that should do the trick.

Serve over cooked pasta. I added mushrooms and red peppers to mine. Broccoli would be a nice addition as well.