I'm making a recipe that calls for honey mustard?!

with salmon i would go with a dijon for sure. it pairs well with honey too.

Dijon. I'd avoid your normal grocery store yellow mustard. That's just my take on it. Mix a very small amount of each with honey and taste a dab. I would go with dijon + natural honey, but everybody has their own taste. You want some tart behind it, but not the kind of tart you find on a philly cheese steak or coney dog.

It all depends on your personal taste. For a milder sauce, use the yellow. If you want a hotter, stronger sauce use the Dijon.

I would say yellow.

Test by one spoon of yellow and one spoon honey.

Any mustard you like. I use Dijon and honey.