Start by peeling and cutting the carrots, slicing the celery, and dicing the onion.
Once the veggies are prepared, melt the butter over medium heat in a large soup pot.
Once the butter is melted, add the onions, carrots, and celery to the pot and stir together on medium heat for around two minutes.
After a couple minutes of cooking, add the sliced mushrooms and continue cooking until the onions are translucent in color and the mushrooms begin browning (around 6 minutes).
Add the minced garlic and cook until fragrant (30 seconds or so).
Next, add the broth to the veggies along with the turkey, wild rice, salt, pepper, sage, thyme, parsley, and rosemary. Increase the heat to medium high until the soup comes to a simmer. Then reduce the heat to low once the soup is simmering.
Cover and simmer for around 15 minutes. Then cook uncovered for an additional 30 minutes (or until the rice is cooked).
Once the rice is cooked, stir in the heavy whipping cream until combined.
Taste the soup and add salt and pepper as needed. This is an important step as it has a big impact on the final flavor of the soup.
Serve and enjoy!