I have a cheese sauce I make that is tasty and easy.

1/4 c sour cream
1/4 c cheddar grated
1/4 c heavy cream

You can do this in the microwave or on the stove. I prefer stove, dump all in a pot and heat.

Microwave:
Stir cheese into sour cream. Microwave 45-60 seconds till hot. Remove, stir in cream and add any seasonings.

I have used fresh pepper, basil or oregano.

5.6g carb for the whole recipe. Stores well in the fridge!