I defrosted 500gms of minced beef, then in my large pan I softened a finely sliced onion & 6 rather sad looking quartered mushrooms. To this I added a handful of oats, dried herbs, an oxo cube, a squirt of tomato puree & the defrosted minced beef. Once the beef was cooked & added the leftover veg & gravy from a previous meal. Last time I was preparing potatoes I peeled, cooked & mashed extra & kept it in the fridge.
I now have 2 cottage pies & 4 portions of bolognese sauce in the fridge/freezer, 4 days when I don't need to cook when I get in from work all in less than half an hour.