To make the breadcrumbs, add the bread, butter, and seasonings to a food processor and pulse together until you reach a medium-fine bread crumb. Reserve for later.

To start, first, gather and prepare your mise en place. Note that the ingredients do not need to be perfectly cut as they will be blended later — they just need to be even, so that they cook at the same rate.

In a medium-sized pot, add the onions, shallots, carrots, potatoes, garlic, cashews and water. Note: The vegetables should be just barely covered with water — adjust the amount as needed. Bring the water and vegetables to a boil and then reduce the heat to low, cover the pot and let simmer for 15 minutes, or until the vegetables are cooked through and tender.

In the meantime, you can gather and prep some of the ingredients for the next step.

To finish the sauce, in a high-speed blender, combine together the cooked vegetables (along with the cooking liquid), Dijon mustard, lemon juice, butter, and seasonings.

A Few Notes:

- If using beer, the amount can be increased to 3 or 4 tablespoons, or to taste.
- While the butter can be omitted from this recipe, it does give the sauce a bit of added creaminess.
- We recommend using non-smoked paprika for this recipe; however, if you really like smoked paprika, feel free to experiment.

Blend the mixture until completely smooth. If needed, add a bit of water to thin the sauce out to your liking.

If using, add the truffle oil. Pulse once or twice and taste for seasoning, adding more salt, pepper, truffle oil and/or nutritional yeast, as needed.

NOTE: This sauce can be used as a topping for other foods such as steamed vegetables.

To cook the pasta, bring a large pot of water to a rapid boil and then add the salt, followed by the pasta.

Cook the pasta according to the package, or until it is just al dente.

In the meantime, preheat oven to 350°F (175°C).

Once the pasta is done, reserve 1 cup of the cooking liquid and then immediately drain and rinse the pasta with cold water.

At this point add the pasta to a large bowl and season it with salt, pepper, and nutritional yeast. If making ahead, add a bit of oil or non-dairy butter to the pasta, to prevent it from sticking together. Also, reserve the 1 cup of cooking liquid as well — you will most likely need it to thin out the sauce later.

Next, add the sauce. Ideally, you should have approximately 6 cups of sauce and 11 cups of cooked pasta. If you have less sauce then this, you may want to reserve some of the pasta for another use or add a bit of the reserved cooking liquid. The pasta and sauce ratio is important, otherwise, the dish dries out too much during baking.

Next, pour the mixture into a 9×12 baking dish (3 qt or 2.85L capacity) and top with the reserved breadcrumbs.

Bake the dish for 30 minutes, or until the cheese sauce is bubbling and the top has turned a nice golden brown color.

If needed, the broiler can be turned on for a minute or two, in the end, to give the top a nice golden finish, but keep a close eye on it as it will color very quickly.

Serve with some freshly ground black pepper and a side salad, or your favorite vegetable and enjoy!

This dish is also very nice with a bit of finely chopped sautéed kale folded into the noodles and sauce, just before the breadcrumbs are added.