How to Make It
Place carrots and fennel in a large bowl, and set aside.
Whisk together shallots, vinegar, herbs, mustard, sugar, salt, and pepper in a small bowl until combined. Whisk in olive oil until emulsified.
Pour shallot vinaigrette over carrots and fennel; toss to coat. Let stand at room temperature 1 hour to marinate. Top with crumbled bacon and chopped fennel fronds just before serving.