1. Prepare the Salmon: Cut the salmon fillet into bite-sized pieces. Set aside.
2. Sauté the Vegetables: In a large pot, melt the butter over medium heat. Add diced onion and sauté until translucent, about 3 minutes.
3. Add Carrots and Potatoes: Stir in sliced carrots and cubed potatoes. Cook for an additional 5 minutes, stirring occasionally.
4. Add Stock: Pour in the fish or vegetable stock. Bring to a gentle boil.
5. Simmer: Once boiling, reduce the heat to a simmer. Cook for approximately 10-15 minutes, until the vegetables are tender.
6. Add Salmon: Gently add the salmon pieces to the pot. Cook for an additional 5 minutes or until the salmon is cooked through.
7. Stir in the Cream: Reduce the heat to low. Pour in the heavy cream and stir gently to combine. Heat for another 2-3 minutes without boiling.
8. Add Dill and Season: Stir in the dill, salt, and pepper to taste. Remove from heat.
9. Serve: Ladle the soup into bowls and garnish with more fresh dill if desired.

These straightforward steps will help you create this delightful soup successfully.