Just because the temperatures are dropping doesn't mean you have to abandon the vegetable garden. We're right at the beginning of a brand new growing season. It's time to yank out the tomatoes and green beans and plant cool season veggies and herbs. If you've never tried your hand at fall and winter gardening you're going to love it because cool whether gardening is the easiest thing you'll ever grow.
Most fall and winter edibles are practically "plant and forget." Potatoes, garlic, saffron crocus, shallots, and allium are all underground edibles. You plant them, give them a bit of water, and then wait for a big spring & summer harvest the following season. Rosemary and lemongrass are herbs that you can grow indoors within easy reach all winter for hearty stick-to-your-ribs soups & stews.