Preparation Melt butter in heavy medium saucepan over medium heat. Add onions; sauté until soft, about 5 minutes. Add clam juice, potatoes, and thyme. Cover and simmer until potatoes are tender, stirring occasionally, about 10 minutes. Add half and half and trout. Simmer 10 minutes. Season with salt and pepper and serve.
Preparation Melt butter in heavy medium saucepan over medium heat. Add onions; sauté until soft, about 5 minutes. Add clam juice, potatoes, and thyme. Cover and simmer until potatoes are tender, stirring occasionally, about 10 minutes. Add half and half and trout. Simmer 10 minutes. Season with salt and pepper and serve.