So far this year we're averaging $550/month. This includes alcohol. Organic produce and meats, wild caught fish, our CSA share, all gardening expenses (since I grow food to preserve I put those expenses here).
I've got 19 jars of blackberry jam, 9 jars of tomato paste, 40 pints of salsa and 12 pints of tomato sauce put up.
60 quarts of ratatouille and about 12 packages of greens. in the freezer.
I'm happy with this considering what I buy.