We'd spend, on average, $5 per meal - but all we usually do is dinner. DH has lunch at work and maybe a bowl of cereal in the morning if he gets up in time - and I never bother with breakfast at all. I have lunch, which usually consists of a pie or sausage roll that I chuck in the microwave or oven.

But when I say $5 per meal, it's because we usually buy, say a $8 tray of beef stir-fry and split it up into two meals worth before putting it in the freezer. Then, we're basically using $4 of meat, and either one cup of rice, one cup of Deb or some salad
BUT! This is just me and my DH (as DS is still way too young to be eating what we eat)