Family of 3, son is 12... our budget for groceries and consumables is at $300 per month. Some months its a little more, some it is a little less. We by no means starve our bodies of nutrition, we buy almost 0 processed foods and only eat out maybe 1 time per month. Which is about all I can handle honestly, our food usually taste a lot better and doesn't give me gas.
Some of our staples include: bread(frozen ready to bake dough), tortillas, dry beans(bulk), lentils(bulk), oatmeal
(bulk), rice(bulk), chicken (purchased in bulk on sale then frozen), Pork (also in bulk when on sale then frozen), coffee (in bulk on sale), creamer (in bulk on sale), dehydrated or frozen spices from our garden, winter squash(again purchased in bulk on sale), potatoes, broccoli, carrots, onions, apples(sometimes wild picked by us), bananas, garlic, dehydrated mushrooms(wild picked by us)....
We have a large amount of food in storage, but it allows us to save our money when food is expensive and take advantage of food when it is on sale.
My normal daily food consumption looks something like this(doesn't change much day to day): oatmeal(bulk plain oats then I add apple sauce, walnuts, and cinnamon) and fruit smoothie(half a banana, frozen berries, yogurt, cranberry juice and ginger) for breakfast. Banana bread and an apple at around 10am. Left overs for lunch (today it was homemade chicken noodle soup). Sandwich at around 3pm. Dinner at around 6pm, could be anything, but always home cooked from scratch. I pretty much only drink water and coffee (that I bring from home in a thermos) at work.