1
Preheat oven to 400 degrees. (TIP: If you have a toaster oven, feel free to skip preheating—you’ll use it to toast the buns in step 3.) Wash and dry all produce.
Trim and halve cucumber lengthwise; slice crosswise into ¼-inch-thick half-moons.
In a medium bowl, toss together cucumber, cabbage, vinegar, 1½ tsp sugar (3 tsp for 4 servings), and a big pinch of salt. Set aside to pickle, stirring occasionally, until ready to serve.