Preheat oven to 200°C (400°F).
Place cauliflower florets on a baking tray.
Drizzle olive oil evenly over vegetables.
Season lightly with salt and pepper.
Roast cauliflower with garlic cloves until golden.
Transfer roasted vegetables to a large pot.
Pour vegetable broth into the pot.
Warm the roasted vegetables with broth for 5–8 minutes before blending.
Blend roasted cauliflower first, then gradually add hot broth to control consistency.
Add extra broth if thinner texture is desired.
Taste and adjust seasoning as needed.
Serve hot with garnish if preferred.