Carp Soup

Ingredients

• 1/2 pound potatoes peeled and cubed
• 1/4 pound carrots peeled and sliced
• 1 teaspoon butter
• 1 onion peeled and finely chopped
• 1 leek trimmed and sliced
• 1 garlic clove peeled and minced
• 1/2 teaspoon ground cumin
• 1 teaspoon paprika
• 1 teaspoon marjoram dried
• 2 cups vegetable stock
• 1 tablespoon tomato paste
• 1 pound carp fillets skinned and cubed, substitute cod or tilapia, if desired
• 1 handful watercress thick stems removed