I have just challenged my DH to this. I have got a spaghetti bolognese using value range were applicable (not the meat) and came up to £3.64.
Basil £0.61 (dried)
Carrot £0.08 (1 carrot)
Chopped tomatoes £0.62 (2 Tins)
Spaghetti £0.19
Mince £1.50
Onion £0.18
Garlic £0.30
Garlic bread £0.33
Have you got any ideas?