1 chopped onion, peel off and cut away the dodgy bits if it's been lying about in the cupboard too long.
A couple of crushed cloves of garlic, if the fresh stuff has shrivelled up in the cupboard hunt for the jar of lazy garlic you know is in there somewhere.
1 tin of chopped toms or if they're not chopped as mine weren't just use a knife and chop them up yourself.
A squirt of tomato puree, cut the tube open as you would toothpaste to get that very last bit out.
S+P, Herbs to your own taste or whatever you can find in the cupboard.
Simmer away in a pan until you have your very own lovely tomato sauce.
Cooked with a bag of Quorn Mince found stuffed at the back of the freezer when you were doing your clever inventory.
Now either make up the packet of cheese sauce again found in the cupboard or make up some fresh cheese sauce with some flour, milk and that hard bit of cheese that was in the fridge that nobody seemed to be eating.
If you're me then realise you've no pasta sheets then take the left over tortilla's from the bread bin and use in place of said pasta sheets.
Then get on with some fancy layer work.
A bit more of that grated cheese because of course you'll have remembered to hold some back for the final topping.
Pop in the oven for 20-30 minutes, I can't be more accurate than that I'm afraid as I kind of lost track of time and just judged it by eye. This style of cooking makes my small people giggle as the timer bell inevitably goes off when we're already sat down and starting eating.
Anyway I digress....
Serve up with a lovely salad and there you are..
A healthy, frugal yummy meal from things you already had in your cupboards/freezers/fridges - see told you those lists would come in handy eh? ;)