You can cast one of the level 1+ spells that you have prepared from your Circle Spells feature without expending a spell slot, and you must finish a Long Rest before you do so again.
In addition, when you finish a Short Rest, you can choose expended spell slots to recover. The spell slots can have a combined level that is equal to or less than half your Druid level (round up), and none of them can be level 6+. For example, if you’re a level 6 Druid, you can recover up to three levels’ worth of spell slots. You can recover a level 3 spell slot, a level 2 and a level 1 spell slot, or three level 1 spell slots. Once you recover spell slots with this feature, you can’t do so again until you finish a Long Rest.
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