Not quite one pot but super quick!
This is ds's favourite; he's a pasta junkie so I always cook double and then zap in the microwave for a minute to warm up.
As he doesn't like lots of the food the rest of the family do this is easy enough to do when we are having something else.
Into the dish he eats the pasta from, add a couple of spoons of pesto, a squirt of garlic purée (or finely chopped garlic to taste), a splash of lemon juice and pour on double cream - maybe equivalent to four or five tablespoons. I usually just pour for 3 seconds and it's enough. Then mix together and zap in the microwave until bubbling - for my mw it's about 40-60 seconds.
Take out and stir the pasta through and it's ready - all should take less than 4 minutes.
Ds likes it with chopped olives on, I often stir ham, left over veg or chopped other veg into mine (I like it with chopped cherry plum tomatoes and raw chicory or spinach - the heat of the sauce is enough to soften them and keep the fresh tasting but accept that lots of people might not like it!)
It's very flexible - more an approach than a recipe
. You can replace the cream with cream cheese or ricotta, mascapone etc. You can add whatever flavours you like or have to hand. If I'm making for me I might add a splash of wine or sherry for a different kick!
Things like tomato purée or sweet chilli sauce or gentleman's relish etc can all be used as instead of the pesto.
You don't even need pasta - you can use the sauce stirred through rice (leftover of the quick microwave rice) for a cheats risotto or use with a jacket potato, mash, couscous etc if you have them.
But, thinking ahead and having extra potato/pasta/rice etc is the key to a speedy supper like this the next day!