Set your oven to 400°F (200°C) to prepare for roasting the vegetables.

Trim the tough ends of the asparagus, cut cauliflower into small florets, and thinly slice radishes using a sharp knife.

In a mixing bowl, toss asparagus and cauliflower with olive oil, salt, and pepper. Spread them evenly on a baking sheet and roast for 10-12 minutes until tender and slightly caramelized.

In a small bowl, mix lemon juice with a pinch of salt and pepper for a simple vinaigrette.

Arrange the roasted vegetables on a plate, garnish with sliced radishes, and drizzle with the lemon dressing.