Method
Preheat your oven to 400°F (200°C).
Place the washed and trimmed beets in a baking dish with a small splash of water.
Cover the dish tightly with foil and roast for about 45 minutes, or until they are easily pierced with a fork. Allow them to cool uncovered.
Once cool enough to handle, peel the beets and cut them into wedges.
Place them in a bowl, season generously with salt and pepper, and toss gently with the red wine vinegar and 1 tablespoon (15 ml / 0.5 fl oz) of olive oil.
Set aside to marinate.
Bring a pot of salted water to a boil and prepare a large bowl of ice water. Blanch the asparagus in the boiling water until crisp-tender, about 2-3 minutes. Immediately transfer the asparagus to the ice-water bath to stop the cooking process and preserve its bright green color.
Once completely cooled, drain and pat dry with paper towels.
Using a small pot, bring water to a gentle boil. Carefully lower the quail’s eggs into the water and cook for exactly 3 minutes for a slightly soft center.
Transfer the eggs to the ice-water bath to cool completely before peeling.
To make the vinaigrette, combine the diced shallot, white wine vinegar, lemon juice, orange juice, and a pinch of salt in a small bowl.
Let it stand for 10-15 minutes to allow the shallot to soften. Slowly whisk in the ¾ cup of olive oil until emulsified.
Stir in the chopped chervil and citrus zests.
Taste and adjust seasoning if necessary.
To assemble, toss the frisée or mixed greens with a small amount of the vinaigrette and divide among four plates.
Arrange the blanched asparagus spears and marinated beet wedges over the greens. Halve the peeled quail eggs and place them on top.
Drizzle each salad with a little more vinaigrette before serving.
Let the diced shallot sit in the vinegar and citrus juices for at least 10 minutes before adding the oil. This step, called macerating, softens the shallot's sharp bite and infuses the entire vinaigrette with a milder flavor.
Don't have farm-fresh beets? Simply use conventional beets from the grocery store. For a more uniform look, cut them into a ½-inch dice after roasting and cooling instead of into wedges.