You don't have to go all the way to once a month cooking to gain the benefits of this approach. Cooking three or four hours once a week can eliminate take out, fast food, missed meals, monotony and broken budgets.

One of the advantages of cooking for large groups from the beginning is that cooking for regular size families or singles seems very uncomplicated. Good habits learned, like prepping all the chopped, sliced and diced vegetables in one convenient effort, simplify family cooking.

Ellen's Kitchen OAMC recipes and plans

OAMC Introduction with basic techniques, how to plan a custom menu, and a design for your work plan.
A simple OAMC Plan for a 10 person soy vegetarian household with a ready shopping list, prep, and recipes.
Beef chunk and ground beef preps for OAMC cooking.
Coming in February, OAMC for singles and pairs improves nutrition, increases variety, reduces food costs for small households, too.
Coming in February, breakfast burritos, quiches, muffins and other choices. Your freezer is healthier and cheaper than any drive in window!
Before you start OAMC: a guide to planning and preparing for a marathon cooking session: records, equipment, planning, freezing.
OAMC techniques and tips for large quantity freezer cooking.

Favorite Offsite OAMC links: Kim Tilley gives a great summary of how to get started with frugal cooking and once a month cooking. Then explore the rest of her thrifty site.
Light recipes for freezer cooking
Hearty recipes for freezer cooking