In a small saucepan, whisk together the apple cider vinegar, bourbon, molasses, agave nectar (or honey), salt and pepper. Slowly whisk in the olive oil.
Set the saucepan over medium-low heat, whisking occasionally, until warm.
The Salad:
In a large serving bowl, combine the spinach leaves, crumbled bacon, roasted peppers and avocado. Pour in the dressing and toss gently. Serve immediately.