Current deal on OzBargain is currently only $20 off first order, so this offer is currently doubled. You need to sign up via referral.
Hook your friends up with $40 off* off their first order and we’ll give you $20 off* your next one!
Shipping is $15 per order or free if you subscribe (looks like you can cancel this. On their website it says: 'You can skip an order, pause your deliveries or cancel your subscription at any time. No fees, no worries.')
Don't forget cashback.
Link to T&Cs appears to be broken.
How much does it work out to be per meal?