How to Make It
Combine molasses and next 5 ingredients (through pepper) in a medium bowl; whisk well. Slowly add olive oil, whisking well until blended.
Combine apples, spinach, endive, walnuts, and blue cheese in a large bowl. Add the vinaigrette; toss to coat, and serve. Extra vinaigrette can be stored, covered tightly, in the refrigerator for 2 days.