Rustle up a moreish veggie traybake full of roasted vegetables and halloumi. An oregano dressing and easy tzatziki take it to another level. Dr Rupy's recipe costs just over £1 per portion.

This basic white sauce recipe is so versatile, and can be dressed-up or dressed-down for any occasion. Add cheese, or flavour the milk with onion or bay. Each serving provides 657 kcal ...