- 1 tablespoon white-wine vinegar
 - 1/4 teaspoon Dijon mustard
 - 2 1/2 tablespoons extra-virgin olive oil
 - 1 large navel orange
 - 1 small firm-ripe avocado (preferably California)
 - 2 Belgian endives
 - 3 slices bacon, cooked until crisp and crumbled fine
 
- In a small bowl whisk together vinegar, mustard, and salt and pepper to taste and whisk in oil in a stream until emulsified.
 - With a sharp knife cut peel and pith from orange and cut sections free from membranes. Cut sections into 1/2-inch pieces and transfer to a bowl. Peel and pit avocado. Cut avocado into 1/2-inch pieces and add to orange. Trim endives and slice thin crosswise. Add endives and dressing and toss salad lightly. Sprinkle salad with bacon.