Mayonnaise.

What to do when the dinner recipe calls for a few tablespoons of
mayo, and there's none in the fridge, with the nearest grocery a 45
minute round trip away?
You make your own.

I was shocked at how simple it was. A little ewey about the raw egg
yolk, but we're not dead yet - I just made sure to keep it off the
baby's food.
A blender, oil, lemon, an egg yolk, salt, and ten minutes is all it
took. And it's delicious with cayenne, garlic, and onion. I may be
hooked.