Roast the Vegetables: Preheat your oven to 425°F (220°C). On a large baking sheet, toss the cauliflower florets, chopped onion, and whole garlic cloves with the olive oil. Season generously with salt and pepper. Spread them out in an even layer.

Achieve Golden Perfection: Roast for 20-25 minutes, or until the cauliflower is tender and has beautiful golden-brown spots on the edges. This caramelization is key for the soup’s flavor.

Blend Until Smooth: Transfer the roasted vegetables to a high-speed blender. Add the vegetable broth, soaked and drained cashews, and lemon juice.

Create Velvet Texture: Carefully blend on high for 1-2 minutes, until the soup is completely smooth and creamy. Caution: If your soup is very hot, blend in batches or allow it to cool slightly first, and always vent the blender lid to prevent steam buildup.

Adjust and Serve: Taste the soup and adjust the seasoning with more salt and pepper if needed. If the soup is too thick for your liking, you can thin it with a little more vegetable broth until it reaches your desired consistency.

Garnish and Enjoy: Pour the soup into bowls and add your favorite toppings.