Creating Roasted Celery & Potato Soup can be straightforward if you follow these simple steps:

1. Preheat Oven: Start by preheating your oven to 400°F (200°C).
2. Prepare Vegetables: Wash and chop the celery, potatoes, and onion. Mince the garlic.
3. Roast Vegetables: Spread the chopped celery, potatoes, and onion on a baking sheet. Drizzle with olive oil, salt, and pepper. Toss to coat evenly. Roast for 25-30 minutes or until golden and tender.
4. Sauté Garlic: In a large pot, heat a little olive oil over medium heat. Add the minced garlic and sauté for 1-2 minutes until fragrant.
5. Combine Ingredients: Add the roasted vegetables to the pot. Pour in the vegetable broth and dried thyme. Bring to a boil, then reduce the heat and simmer for 10 minutes.
6. Blend the Soup: Using an immersion blender, blend the soup until smooth. Alternatively, you can transfer it to a blender in batches.
7. Add Cream: Stir in the heavy cream or coconut milk. Adjust seasoning with salt and pepper to taste. Warm through on low heat.
8. Serve: Ladle the soup into bowls and garnish with fresh parsley if desired.

These steps will guide you in creating this incredible soup effortlessly.