I get my bags of frozen veg from Sainsburys. Chopped onion, find fixed veg/soffrito mix, chopped tomatoes, sliced peppers, roast mixed veg, garlic, cubes of herbs... Brilliant. Also jarred chopped garlic and ginger.
My slow cooker is my best friend, I use it loads. I make bolognaise sauce in it - pack of beef mince and one of pork mince, browned, some frozen fine chopped veg from Sainsburys,couple of handfuls of red lentils, two large carrots and two courgettes, grated, two tins of tomatoes, two cartons of passata, garlic, rosemary, basil, black pepper , on Los for. 8 hours. Makes 3-4 meals worth, bag in Pour and Store bags and freeze. You can use a bag to make a lasagne for a change.
All manner of stews/casseroles. Chicken with apple and veg cooked in apple juice. Chicken with chopped chorizo, can if drained chickpeas, tin chopped toms, carton of passata, some smoked paprika. Italian beef, diced beef with some frozen peppers, onion, mushrooms, jarred black olives, passata. Morrocan beef, diced beef, dried apricots, peppers, celery, chopped plums, some ras el hanout spice mix, garlic, passata, some beef stock. Chicken in cider with veg and apples. Diced pork shoulder with veg and a can of ginger beer. Diced pork shoulder with canned mixed beans, passata, worcestershire sayce, lits of herbs and garlic. Sausages and veg or canned beans, sausages with lentils and lits of herbs and garlic.
Chicken thighs are brill in the slow cooker and half the price of breasts.
Pot roasts, brisket with Guinness, serve with veg, shred leftover meat into ready made curry sauce the next day. Gammon joint in water, serve with mash and peas and gravy, use the cooking water to make soup with some elderly veg and half a bag of yellow split peas. Shred leftover gammon into the soup once it's blended. Use more leftover gammon mixed with pasta, cheese sauce and microwaved frozen spinach. Pork shoulder cooked till its falling apart, mix with home made or bought BBQ sauce, serve in floury buns or wraps with beans and coleslaw on the side. Chicken, slow cooked, served with veg one day, leftovers into a curry, a risotto with peas and lashings of Parmesan, pasta and tomato sauce, fajitas, stir fry, millions of things.