Place red wine vinegar, finely chopped shallot, honey, Dijon mustard, 1 cup of the strawberries, and ¼ teaspoon of the kosher salt in a blender. Process until smooth, about 30 seconds. With blender running, gradually drizzle in oil, processing until mixture is smooth and combined, about 30 seconds.
Arrange spring mix on a large platter. Top with feta, sliced shallot, tomatoes, bacon, and remaining 2 cups strawberries and ½ teaspoon salt. Drizzle vinaigrette over salad, and serve immediately.