No. 1 | Preheat your oven to 425° F. Line a baking sheet with parchment paper.
No. 2 | In a large bowl, toss 2 pounds (900 g) of chopped beets and 1 quartered fennel bulb with 1 tablespoon (15 ml) of olive oil and season with salt and pepper. Arrange the beets, in a single layer, on the prepared baking sheet. Roast in the oven for 30 minutes, until lightly caramelized.
No. 3 | Heat remaining 1 tablespoon (15 ml) of oil in a soup pot on medium-high heat. Add the chopped red onion and sauté for 3 to 5 minutes, until softened. Mix in the roasted beets and fennel, 2 tablespoons (30 ml) orange zest, 1 cup (250 ml) fresh squeezed orange juice, and 5 cups (1 1/4 L) of water. Bring to a boil, then reduce heat, cover, and simmer for 30 minutes.
No. 4 | Cool the soup for 15 to 20 minutes to make it safe for blending. Transfer the soup to your blender and pulse on high speed for 1 minute until the soup is perfectly smooth, free from any lumps or noticeable fibres.
No. 5 | Return the soup to the pot and heat on medium until it is hot again. Season with salt and pepper to taste. Garnish the soup with a sprinkling of fennel fronds.