There’s budget dining and then there’s Sagar, the ridiculously affordable trio of southern Indian vegetarian restaurants. This modest London group has achieved something close to cult status among students and indeed anyone feeling the pinch. The no-frills surroundings don’t exactly inspire reverie, but the lack of show is part of the charm. Expect decent, dependable regional dishes including idli (rice dumplings), dosas and uttappams (lentil ‘pizzas’ with spicy toppings) joined by a full quota of veggie curries, fluffy rice and home-baked breads, best enjoyed with a Kingfisher beer. For unbeatable value, settle on the mini lunchtime thali (£4.50) or pick up one of the unbeatable takeaway lunch boxes (two veggie curries, raita, rice, a paratha and a tiny salad).