Microwave 5 cups broccoli florets and 1 tablespoon water in a bowl, covered, 2 minutes. Combine 1/4 cup cider vinegar, 1/2 thinly sliced shallot and 1 teaspoon sugar in a small bowl; set aside. Cook 3 bacon slices in a skillet until crisp, 6 to 8 minutes; drain, then crumble. Stir 1 tablespoon bacon drippings and 3 tablespoons sour cream into the vinegar mixture. Toss with the broccoli, 1/3 cup dried cranberries and the bacon. Season with salt and pepper.