In large pot, heat water for pasta. Add 3 teaspoons (or 1 Tablespoon) of the salt to water. Once boiling, add pasta and cook according to package. Strain and put pasta back into empty pot.
Meanwhile, in a medium pot, steam potatoes. While waiting, put the remaining ingredients (including the remaining 2 t of salt) in the blender/Vitamix container. Once potatoes are soft, carefully add them to the blender container, as well. Puree altogether.
Now pour your "cheese" over the pasta and mix together.
Scoop mac & cheese into bowls or plates. Serve alone or with a side, like cherry tomatoes and sliced cucumbers, or a salad.We recommend that all meals for children be served with milk.