Wash hands with soap and water.

Fill 1 pot with 6 cups of water and bring to a boil. Once the water is boiling, add pasta and cook for 8 minutes.

Drain pasta and fill the same pot with 2 cups of water, bring to a boil.

Place the chopped cauliflower in the boiling water and cook until the florets are soft (about 4 minutes). Drain cauliflower.

Place the cooked cauliflower, 1/2 cup milk, and garlic salt in a blender and blend until smooth.

In a separate pot, heat oil. Add the flour and whisk until the mixture is smooth. Add 1 cup of milk and cook the mixture until it bubbles and thickens. Add the cheese and cauliflower mixture and stir.