Making Roasted Celery & Potato Soup is simple if you follow these easy-to-follow steps:

1. Preheat the Oven: Begin by preheating your oven to 400°F (200°C).
2. Prepare the Vegetables: Wash and chop the celery, potatoes, and onion. Mince the garlic.
3. Toss with Olive Oil: In a large mixing bowl, combine the chopped celery, potatoes, and onion with olive oil. Season with salt, pepper, and thyme.
4. Roast the Vegetables: Spread the vegetable mixture on a baking sheet in a single layer. Roast in the preheated oven for 25-30 minutes, or until the vegetables are tender and slightly caramelized.
5. Sauté Garlic: In a large pot, sauté the minced garlic over medium heat for 1-2 minutes until fragrant.
6. Add Broth: Pour in the vegetable or chicken broth and bring it to a simmer.
7. Combine Vegetables and Broth: Once the roasted vegetables are done, add them to the pot with the broth.
8. Blend the Soup: Using an immersion blender, blend the soup until smooth. Alternatively, you can transfer it in batches to a blender.
9. Stir in Cream: After blending, stir in the heavy cream or coconut milk until well combined.
10. Adjust Seasonings: Taste the soup and adjust the salt and pepper as needed.
11. Serve Hot: Ladle the soup into bowls, and garnish with fresh parsley or chives if desired.

These steps will guide you in creating an incredible Roasted Celery & Potato Soup that is sure to impress!