Making a chicken (£5) comfortably last a week.
Day one - roast chicken with potatoes or salad or whatever.
That night - all leftovers and bones in stock pot, cover with water and stick in parsley, onion, bay leaf (easily nicked from a tree somewhere), garlic, celery. Boil 90 mins.
Cool and shred the remaining meat off the bones.
Reserve the stock.
Day one ramen - take stock, use to boil noodles. Season with some soy sauce and seasame oil. add some shredded chicken, crispy onions, chopped spring onions, a boiled egg, dash of cream.
Day two curry - fry onions and garlic and ginger. Fry off some curry powder or a combo of chili powder, paprika, ground coriander, garam masala. Add chicken stock and either canned tomatoes or tomato paste. Reduce down. Add some cornflour if it's too thin. Add shredded chicken and top with fresh coriander. Serve with rice.
Day three chicken supreme: make a roux with butter and flour. Pour on chicken stock. Salt and pepper. Add a squeeze of lemon juice and some cream. Serve with veg / rice / mash whatever.
Day 4: Risotto. Make a risotto. Use the chicken stock and add the shredded chicken at the end.
Also with shredded boiled chicken salads or sandwiches.
Top tip: get the squeezy tubes of garlic and ginger pastes. They last ages and don't go off. Other top tip: make sure they know how to cook rice! Loads don't.
Another top tip: for parents setting up kids at uni, invest in long term stuff like herbs, spices and oils (sesame, olive etc). Stock cubes. Stuff where you just need a bit but if you have to buy it all for one recipe it becomes too expensive to justify. Perishables they can buy themselves and will be gone within a week.