Chilli con queso

I have always ordered this if its on the menu at a Mexican restaurant. I just love it.
Chilli con queso = a dipping sauce of melted cheese and chopped chili peppers 
I think there are a lot of variations out there, some quite creamy to cater for conservative tastes and very mild chillis.  Some come out quite pink as restaurants add tomato sauce or an equivalent to it.
I like to add onion to mine and sometimes chop up tomatoes and throw in some jalapenos as well to give it a bite.
Here is one recipe from taste.com.au

1. some butter, about a teaspoon full  into a pot on the stove, medium to high
2. Half an onion sliced and diced, do not over caremalise it (I sometimes put it in later so it has some crunch)
3. Some milk, about 1/2 cup 
4. Grated cheese. About 1 to 1 1/2 cups. I use cheddar but lots of variations on theme. Generally firm to hard cheeses with medium to strong taste. Things like Brie/Camembert  are too mild.
5. some flour (about a tablespoon (to thicken the mixture, although you may need more) ) 
6. Chopped and diced tomato 
7. Jalapeno peppers (from tin, they are usually quite soft).
8. Serve up in a ramekin bowl  

A large bowl of corn chips to go with them. The more natural they are the more flavour you get from the dip
A nice entree before a Mexican meal of tacos or as a snack.