Weekly groceries bill under $60

Time to reduce the household bills so ends don't just meet they overlap - I'm going to start with my groceries and see if I can get it under $60 per week for a family of 4 - including my 2 teenagers.  I have done a base list of must haves for the week - which is basically cheap meals so I can spend more money on building up my stock.  Plan is to spend $40 on musts for the week and $20 on stock or things that will last longer than the week so I don't have to purchase them within the next weeks budget.  Plus I'm going to search items on sale and coupons to help me out.  Once I have done the shop (Saturday) I will post my list and recipes that I plan to cover.  It will be tough the first few weeks (Christmas day shop will not be included).  Plus I will be cooking with ingredients that I have in stock so that will help me out.  Currently I'm spending about $100 + on groceries so that has to stop.  If you know of any really good cost cutting recipes that I could use, please post them.  My children both buy lunch at school so I don't have to buy lunch stuff for them but my husband takes his lunch with him.  I will be looking at children's lunches down the road but everyone has to start somewhere - plus we have a dog so will be including dog food as well.