The "what should we eat" problem was a big source of tension in our household since the arrival of our first child. Too much time-consuming, too much planning effort. What changed our life (and I really mean it) is the app https://jow.com: it suggests you a list of meals for the week suited to your family and equipment, and it creates a shopping list for your preferred delivery provider. I only have good things to say about it and could go on for hours.