01 -
Preheat oven to 400°F (200°C).
02 -
Place asparagus and radishes on a baking sheet. Toss with 2 tbsp olive oil, salt, and pepper.
03 -
Roast for 20–25 minutes, turning once, until tender and lightly browned.
04 -
In a bowl, whisk together whole grain mustard, Dijon mustard, garlic, olive oil, and honey (if using) until emulsified.
05 -
Season the vinaigrette with salt and pepper to taste.
06 -
Arrange the roasted vegetables on a platter and drizzle with mustard vinaigrette. Serve warm or at room temperature.