Preheat the oven to 400 degrees Fahrenheit. Line a baking sheet with parchment paper or aluminum foil.
In a large bowl, add romanesco and garlic. Drizzle olive oil, and sprinkle with salt and pepper. Toss evenly to coat.
Spread romanesco florets on prepared baking sheet in a single layer. Bake for 18 to 20 minutes, turning florets halfway through until slightly browned. Remove from the oven and allow to slightly cool.
Drizzle with lemon juice and serve warm.
Notes
Nutrient values are estimates only. Nutrition information can vary for a recipe based on precision of measurements, brands, and ingredient freshness, among other factors.