Prepare wild rice. Bring water to a boil in a medium saucepan over medium-high heat. Add wild rice and salt, cover, reduce heat to low and simmer for 1 hour.
Heat oil in a large pot over medium heat. Add sausage and cook until browned, breaking up any large pieces. Add onion, garlic, oregano, basil and chicken stock. Bring to a boil, add kale, reduce heat and simmer until kale is soft, about 5 minutes.
Add cooked wild rice and tomato. Simmer for 4 to 5 minutes. Season with salt and pepper and top with a dollop of sour cream.