[pmoriarty]

"For example, the article mentions that they used the cost for only 1/2 of an onion if the recipe called for only 1/2 an onion, but what happens to the other 1/2? Depending on how often you cook at home, how often you go out of your way to use existing ingredients, and how much time you spend meal-planning, you'll either manage to use the rest of the onion (which is pretty easy for something as common as onions), or it will go to waste. Personally, since I'm typically just cooking for 1, most of these end up going to waste unless I want to be eating the same thing for several days in a row."

You can freeze a lot of fresh food for later use. That's what I use with a lot of the fruits and vegetables I buy, and then use them in smoothies. Cookies can be frozen. Bread can be frozen.

Often I'll save time and effort by buying frozen fruits and veggies. They're often fresher than "fresh" produce, as they're usually frozen immediately after they're picked rather than sitting around unfrozen in transport and then on the store shelf who knows how long before you buy them.

For example, you can buy frozen, chopped onions, and save yourself the time, hassle, and tears of chopping them yourself. I buy frozen fruits and berries, and "triple washed" kale and throw it immediately in to the freezer for use in smoothies. Lots of time saved and it's very economical. Nothing goes to waste.