Roasted Cauliflower Soup
A creamy, velvety soup made by roasting cauliflower to bring out its sweet, nutty flavors. This kidney-friendly version is rich and satisfying without using any cream, making it a light yet comforting meal.
For 4 servings
Preheat oven and prepare cauliflower.
- Preheat your oven to 400°F (200°C).
- Toss the cauliflower florets in a large bowl with 4 tablespoons of olive oil, the pinch of salt, and black pepper.
- Spread the cauliflower in a single layer on a baking sheet.
TIPTo reduce potassium, you can blanch the cauliflower florets in boiling water for 5 minutes, then drain well before tossing with oil.Roast the cauliflower until tender.
Roast for 20-25 minutes, or until the cauliflower is tender and lightly browned on the edges. Roasting deepens the flavor and adds a natural sweetness.
Sauté the aromatics.
- While the cauliflower roasts, heat the remaining 2 tablespoons of olive oil in a large pot or Dutch oven over medium heat.
- Add the chopped onion and cook until softened, about 5-7 minutes.
- Add the minced garlic and thyme sprigs, and cook for another minute until fragrant.
TIPCook the onions slowly to bring out their sweetness without browning them too much.Combine and simmer the soup.
- Add the roasted cauliflower to the pot with the onions and garlic.
- Pour in the 4 cups of water and bring to a simmer.
- Reduce the heat to low, cover, and let it gently simmer for 15 minutes to allow the flavors to meld.
Blend the soup until smooth.
Remove the thyme sprigs. Use an immersion blender to puree the soup directly in the pot until it's completely smooth and creamy. Alternatively, carefully transfer the soup in batches to a regular blender and blend until smooth.
TIPIf using a regular blender, be sure to let the soup cool slightly and leave the lid vent open (covered with a towel) to allow steam to escape.Garnish and serve.
Stir in the fresh lemon juice. Ladle the soup into bowls, garnish with fresh parsley, and serve warm.
What to keep in mind.
4 tips from the recipe — small details that make a real difference to the final dish.
- 1For extra flavor, add a bay leaf along with the thyme sprigs and remove it before blending.
- 2Ensure the cauliflower is in a single layer on the baking sheet for even roasting and browning.
- 3The soup can be stored in an airtight container in the refrigerator for up to 3 days.
- 4This soup freezes well. Let it cool completely before transferring to freezer-safe containers.
Adapt it for your goals.
Vegan
This recipe is already vegan and dairy-free as it uses olive oil and water.
low carbLow carb
This soup is naturally low in carbohydrates, making it suitable for a low-carb diet.
healthyHealthy
To further reduce fat, you can decrease the olive oil to 3 tablespoons total, using an oil spray for roasting the cauliflower.
Why this is on our healthy list.
Low in Sodium
Using water instead of commercial broth and minimal salt helps manage blood pressure, which is crucial for kidney health.
Rich in Antioxidants
Cauliflower is a good source of antioxidants and vitamin C, which help reduce inflammation in the body.
Phosphorus-Friendly
This recipe avoids dairy, nuts, and whole grains, keeping the phosphorus content low to protect bone and heart health on a renal diet.
Good Source of Fiber
Cauliflower provides dietary fiber, which is important for digestive health and can help manage blood sugar levels.
Frequently asked questions
Yes, this version is very healthy. It's packed with vegetables, low in sodium, and free from dairy and saturated fats. Roasting the cauliflower enhances its nutritional profile and flavor without needing heavy ingredients.