I like to add queso to my nachos. A lot of times I will make my own, but often, to save time and money, I buy whatever queso I feel like using or is on sale. I thin out the queso to a pourable consistency using hot water. I pour it onto the chips before adding the chicken, shredded cheeses, beans, and the next layer gets the same treatment. I drizzle more queso over the top of the whole thing before it goes into the oven.