Preheat your oven to 400°F (200°C). Line a baking sheet with parchment paper or foil for easy cleanup.
Wash the baby fennel bulbs and pat them dry. Remove any tough outer layers and trim the stalks, leaving a small portion of the stem intact to hold the halves together.
Place the fennel halves on the prepared baking sheet. Drizzle with olive oil and honey, then sprinkle with a pinch of salt. Toss well to ensure each piece is evenly coated.
Roast in the oven for 25–30 minutes, flipping the fennel halves halfway through. They should be golden brown, caramelized, and fork-tender.
Remove the fennel from the oven and transfer to a serving plate. Drizzle with Meyer lemon, honey, and mustard vinaigrette, and a little extra olive oil. Garnish with fennel fronds and Meyer lemon zest. Serve warm as a side dish or as part of a salad.