To make in a slow cooker (NOTE: I have not yet tried this, so it would be an experiment! This is my best-guess method.): To the slow cooker, add the pasta, cauliflower, 8 ounces evaporated milk, 3 1/2 cups water, salt, garlic powder, and pepper. Cook on low for 3 to 4 hours, until most of the liquid is absorbed. Check periodically and if the noodles seem too dry, add a bit of water as needed. Stir in the shredded cheese and cream cheese. Taste and adjust seasoning as desired.
I don’t recommend gluten-free pasta, as it breaks down and becomes very gummy.