Our groceries, food and restaurant bills run at $5K per month for 2.5 persons.... .5 is because when we cook at home and my son is in we cover his food cost too. I am struggling to reduce this amount for my retirement planning. Our breakfast is cheap and simple, restaurant one weekend a week and the rest of the time peanut butter on toast. Lunches are typically out as we are working. Cook 2 dinners at home per week, leftovers a couple of nights and eat out the rest of the time. We don't do cold meals - no deli meat sandwiches for us. 5K per month includes household items - toiletries etc. My health is not good and I cannot be on my feet for extended period and I am constantly exhausted, hence I don't cook as much as I would like to. But cooking at home is not cheap too. 
I am trying to get the number down to 3K a per month and I thinking that I am not being realistic. Suggestions?

I am trying to get the number down to 3K a per month and I thinking that I am not being realistic. Suggestions?