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.
I make scalloped potatoes in a cream sauce.
3 pounds potatoes, peeled and sliced thin (1/8")
3.5 cups half and half
2.5 teaspoons kosher salt
1/2 teaspoon fresh thyme (or 1/4 teaspoon dried)
2 cloves minced garlic
8 hunks of butter
Cook the sliced potatoes down on the stovetop for about 13 minutes until the sauce thickens. Transfer all to a buttered baking dish, top with 8 hunks of butter, then bake in a 350° oven for 1 hour, rotating 1/2 way through.