Sun tea is one of those things I plum forgot about for years. But I wanted to make iced tea the other day and didn't feel like turning on the kettle, seeing as my kitchen was already 90°F.
Then I remembered sun tea.
To make it, you leave tea bags in a clear glass jar filled with water in a warm and sunny spot, like a porch or a window sill. A few hours later, your tea is brewed. The water never gets hot enough to over-brew the tea, so it won't taste tannic even if you leave it in the sun all day.
I made some with a single green tea bag in a small jam jar, then poured it over ice and added a tablespoon of ginger syrup. I think it's my new go-to drink for the rest of the summer.