In a small pot add the 1/2 tsp of sodium citrate along with 1 cup of milk. Heat till the milk simmers and the sodium citrate is dissolved. Add the grated cheddar cheese and Velveeta to the milk and stir till all of your cheese has completely melted
In a separate pot add the butter and the flour. On a medium heat stirring frequently cook for 5 minutes.
After 5 minutes of cooking add the rest of the warmed milk and whisk to incorporate.
Finally add the seasonings and the cheese sauce (that you just made) and cook for 5 minutes more or until the sauce has thickened up.
Pour the cheese sauce over the cooked vegetables and ham and enjoy for dinner!!