Cauliflower Alfredo

I can't say as I've every really liked dairy alfredo sauce - not sure if I've ever had it. But my husband encourages me that this is better than any "real" alfredo sauce that he's ever had. You be the judge!

1 cauliflower
1 onion
2 cloves garlic
2/3 cups nutritional yeast
1 1/2 tsp salt (add more to taste)
1 Tbsp garlic powder
1 Tbsp onion powder

Steam cauliflower, onion, and garlic until soft. Pour into blender and seasonings. Blend until smooth. Adjust the seasonings to your preference. Serve over noodles and top with sun-dried tomatoes. I like to use whole wheat pasta, but any will do!