Cheap and healthy usually pull in opposite directions. The exception, and the entire secret of budget cooking, is legumes. Beans, lentils and chickpeas are the cheapest protein and fibre in any supermarket, and they happen to be what most expensive health foods are made of anyway.
The cheapest healthy ingredients in the shop
Dried red lentils, tinned beans, oats, eggs, frozen vegetables, rice, and whatever vegetables are reduced. Build your week from these and the numbers work out to low single digits per day.
Five dinners under a fiver
Red lentil dal
Lentils, curry powder, tinned tomatoes. Makes three portions.
Chilli sin carne
Two tins of beans, one of tomatoes, cumin, rice. Four portions.
Egg fried rice
Rice, two eggs, frozen peas, soy.
Jacket potato plus beans
The classic exists because it works.
Pasta e fagioli
Pasta and white beans in garlicky tomato sauce.
When cooking isn't happening (the honest maths)
The real budget-killer isn't groceries, it's the takeaway you order when cooking collapses. Against a delivery order, a shelf-stable bowl in the cupboard is the cheap option. A fiid Starter Box works out at EUR 3.50 a meal, high in protein and fibre, ready in 90 seconds, no delivery fee, no rider tip.
Batch cooking without a freezer
Halls freezers are full or forbidden. Batch-cook only what survives three days in your fridge shelf (dal, chilli), and keep ambient meals as the second half of the week.
FAQ
What is the cheapest healthy meal for students?
Red lentil dal: pennies per portion, high in protein and fibre.
Is it cheaper to cook or buy ready meals as a student?
Cooking from dried legumes is cheapest per portion. But compare ready meals with what actually replaces them (takeaways), not with ideal cooking, and good ambient bowls win the realistic comparison.