Prepare the vegetables
Peel and wash the pumpkin, potato, carrots, onion, and garlic. Remove the pumpkin seeds, then cut the pumpkin, potato, carrots, and onion into medium-sized chunks.Cook the vegetables
Place the pumpkin, potato, carrots, onion, and garlic in a large pot. Pour in the water and bring everything to a boil over medium-high heat.Reduce the heat to medium and cook for about 40 minutes, or until all the vegetables are completely tender and most of the water has evaporated. Check the pot toward the end of cooking to prevent the vegetables from sticking.Add the seasonings
Remove the pot from the heat. Add the olive oil, salt, black pepper, and vegetable seasoning. Stir gently to distribute the seasonings.Blend the soup
Using an immersion blender, blend everything directly in the pot until the soup is completely smooth, creamy, and free of lumps. If it is too thick, blend in a small amount of hot water until it reaches your preferred consistency.Finish cooking
Return the pot to medium-low heat. Stir frequently and allow the soup to come to a gentle boil. Cook for another 3 to 5 minutes, then remove it from the heat.Serve
Pour the hot creamy pumpkin soup into bowls. Top each serving with sour cream, a drizzle of olive oil, and toasted pine nuts. Serve immediately.