I buy stuff that lasts. For bread, I find that rye takes weeks longer than white or wheat to start going bad, and bagels last ages too. I make smoothies with mostly frozen fruit. For dinner stuff, if I’m not feeling like cooking I either buy things I’m going to eat in the next few days or I get these sealed precooked things from Aldi that are great and keep well. Coconut milk also tends to keep better than cow milk and lately I’ve realized I greatly prefer it.

About the only things that are super perishable that I keep around are bananas and avocados, and I just tend to eat these a lot. I also keep spinach or kale around for my smoothies, but I rebag them into separate smaller bags as soon as I get them. If my bananas are getting overripe, they get frozen for smoothies.

I also tend to buy canned soups, which last ages.

When I was cooking regularly I’d make a lot of chilis and pasta sauces. They’re good to freeze and they keep well on their own. Chili is arguably better after freezing and having more time to develop.

You can definitely eat pretty healthy and keep plenty of food in the house without constantly chasing waste.