In a pinch when out of tartar sauce I’ve mixed green relish with mayo and it’s, passable.
For that matter, mayo with hot sauce and ketchup was my accompaniment to some otherwise bland pizza and tater tots this afternoon.
Microwave Hollandaise sauce. Can go wrong easily, but when I wanted it quick it works fairly well. Just have to tend the microwave every 15-20 seconds to mix it before it coagulates. But it’s done its job more than once for me.
Butter sauce, grab a bunch of butter, melt it and pour.
Throw a bit of minced garlic in there and I’m sold.
Immersion blend two egg yolks with a tsp of water and lemon juice, then stream in your melty hot butter from the sauce pan while you keep immersion blending and you got a banger hollandaise.
Put in some garlic powder, Italian seasoning, and a little sugar and you have a nice way to flavor many things.
Add a little garlic salt, dip fresh broccoli florets in it. Surprisingly good.