Good hearty meals for winter that freeze well:
Oven meals:
Lasagna
Cottage Pie (either beef or lamb mince)
Chicken and mushroom pie with pastry (or mashed potato) top
Smoked fish pie: Poach smoked white fish (eg. cod, haddock) in milk, flake and scatter in pie dish, along with small florets of brocolli. Make white sauce with the poaching milk and pour over. Top with mashed potato, a good scattering of breadcrumbs over the top, (and a handful of grated cheese if desired). Freeze, thaw, bake.
Also, consider having some joints of chicken (drumsticks, thighs etc) that you season/marinade and freeze, so you just tip the bag into an oven tray and roast.
Can also do veggies this way in another bag.
I have not yet figured out how to do potatoes for freezing though - but I often get a bag of baby potatoes, slice diagonally across the middle and marinade in olive oil, garlic granules, good pinch pepper and good pinch chopped rosemary - in a ziploc bag that I can tip into a tray either later in the day or the following day to roast.
Sauces for a pot:
Chilli con carne or vegetarian chilli
Spag bol
Tomato sauce with chilli (useful to throw in a handful of prawns, fish to quickly cook as it heats, or precook chicken/bacon and add sauce, while pasta cooks)
Various Indian curries - Vadagam, Korma, Butter Chicken, Lamb Rogan Josh etc..
Thai curries - red or green
Mac'n'cheese (mine involves any pasta shape but shells and penne are good, lots of cheese sauce, bacon lardons fried up, and lots of extra veg like onion, garlic, mushrooms, peppers, courgette, peas, etc - something I tend to do as a large pot and freeze leftovers, which are possible to reheat in pot but I usually do as a pasta bake with extra grated cheese on top).
Stew-types
Chicken chasseur
Beef Bourginonne (sp?)
Lamb or chicken tagine
Beef and Guinness stew
Also make space for sides like veggies already prepped, to cook or reheat (or bags of good frozen veggies from SM). Plenty of garlic bread for meals it can accompany. Home made naans for indian meals (or boxes of pre-made puppodums in the cupboard that you don't have to fry up).