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During this time, the sauce will thicken. Once it starts to boil, take it off the heat, add the macaroni noodles, and stir until everything is mixed together.
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In a medium-sized pot, heat mac and cheese with oat milk over medium heat while stirring all the time. Pour the contents of the blender into a medium-sized bowl, and then slowly add the arrowroot powder while whisking constantly until the mixture is smooth. I like to use three cloves, but if you're not used to it, start with one or two. Next, add more or less garlic, depending on your taste. Blend for about 2 minutes, or until everything is smooth.
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For the best results, make sure to use filtered water instead of tap water. To make the sauce, put everything but the arrowroot powder into a blender except for the cashews. Follow the directions on the box to cook the macaroni, then rinse it under cold water and set it aside.
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