Finely dice the yellow onion and mince the garlic clove.
Clean the wild mushrooms and slice them thinly.
In a medium pot, melt the ghee over medium heat and add the chicken breast, searing until cooked through, then remove and shred into bite-sized pieces.
In the same pot, sauté the onions and mushrooms until the mushrooms are golden and have released their moisture.
Stir in the minced garlic and fresh thyme, cooking for 1 minute until fragrant.
Pour in the chicken bone broth and bring to a gentle simmer for 10 minutes to meld the flavors.
Use an immersion blender to partially blend the soup for a thick bisque consistency, leaving some mushroom chunks for texture.
Stir the shredded chicken back into the pot.
Reduce heat to low and stir in the heavy cream, sea salt, and black pepper until fully incorporated and warm through.