When you already have the pan hot, make twice the recipe and cool the extra quickly. Refrigerate what you will eat in a few days and freeze the rest in portions. The second meal costs mostly the ingredients, not another delivery fee or a restaurant markup.
This works best for food you already like: soup, curry, beans, pasta sauce, roasted vegetables. A double batch you will not eat is waste, and waste is not a saving.
Start this week
Double the next meal you cook from scratch and put tomorrow’s portion in a box before you sit down to eat.