Prepare the Mushrooms: Clean the pheasant back mushrooms by gently wiping them with a damp cloth. Slice them thinly to ensure even cooking and tenderness.
Sauté Onions and Garlic: Heat the olive oil in a pan over medium heat. Add the chopped onion and minced garlic, cooking for 3-4 minutes until soft and aromatic.
Cook the Mushrooms: Add the sliced pheasant back mushrooms to the pan. Stir occasionally, cooking for 5-7 minutes or until they release moisture and begin to brown.
Add the Broth and Cream: Pour in the vegetable or chicken broth. For a creamy version, add the heavy cream. Stir and bring the mixture to a simmer, cooking for 5-10 minutes.
Season and Garnish: Season with salt, pepper, and fresh thyme. Stir well and garnish with fresh parsley before serving.