Cook pasta according to package directions and begin making the sauce.
Add butter to a large saucepan or deep skillet over medium heat. Once butter is mostly melted, add the cooked lobster meat and stir, heating up the lobster for about 1-2 minutes. Remove the lobster and transfer to a bowl; set aside.
Add the shallots and garlic, then sauté for 1-2 minutes, just until they are softened and fragrant.
Sprinkle flour and whisk into the garlic butter mixture. Whisk in almond milk and continue whisking until the flour has blended into the sauce and there are no clumps.
Add your dairy-free cheddar-style shreds, whisk until some of it melts, then add dairy-free mozzarella shreds and whisk until smooth. This may take a few minutes of vigorous whisking, depending on the brand of dairy-free shreds you use. During this time, you can add a little bit of hot starchy pasta water, about 2 Tablespoons at a time as needed, from the pasta that's cooking to help prevent the shreds from seizing up and helping create a smooth sauce.
Add in the nutritional yeast, salt, pepper, and paprika, and whisk all together until the mixture is creamy and smooth.
Drain pasta, then slowly add the pasta and combine until pasta is coated in the cheesy mixture.
Serve immediately.
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Notes
Makes approximately 6 servingsTip: pay particular attention while melting and whisking the dairy-free cheese. Whisk the DF cheese vigorously to create the sauce. Depending on which particular brand of non-dairy cheese you use, this could take a few minutes, since DF cheese tends to melt slower than regular cheese. Definitely add hot starchy pasta water as needed to help create the sauce, adding 2 Tablespoons at a time. Vegan Mac & Cheese option: you can omit the lobster to make this a vegan mac and cheese. Storage: Store leftovers in an airtight container in the refrigerator for up to 5 days.To reheat: Take leftovers out of the refrigerator and set on the counter for a few minutes to bring to room temperature. Reheat in a Dutch oven over medium heat; add a tablespoon of unsalted butter to add creaminess to the sauce and stir until the sauce is heated and thickened a bit. Or reheat in single servings in the microwave with a tablespoon of butter for 1 minute, stir, then reheat for another minute and stir.