Inspired by classic bread-and-butter pickles, these sweet-and-sour pickles are a bit more sour than sweet with a hint of mustard and dill. Apple cider vinegar lends a fruitier flavor to the no-cook brine than white vinegar, which is often used for making cucumber pickles.
Stuff the cucumbers and dill into a 1-quart glass or plastic jar with a tight-fitting lid.
In another 1-quart jar, combine the vinegar, water, sugar, salt and mustard. Close the jar and shake vigorously until the sugar and salt dissolve. Pour over the cucumbers, cover and refrigerate for at least 6 hours (preferably overnight) or up to 1 month.
These quick pickles call for thin-skinned cucumbers, such as Persian, kirby or English. You can also use thick-skinned cucumbers, but I recommend partially peeling them to allow the brine to permeate the cucumber.