Healthy add-ins for mac and cheese?

[Guest guest]

One of my favorite things about the Vitamix (besides the yummy smoothies) is

making cheese sauce from scratch, my daughter now loves homemade mac n' cheese -

no more boxes! However, I'd like to try adding other things to the cheese

sauce to thicken it and make it healthier - am thinking white beans or cashews

- just wondering if anyone has done this and has an idea of how much to add?

Any other suggestions that won't alter the flavor/color in an obvious way?

Thanks!