Add the remaining butter and the sliced mushrooms are in the same skillet that the chicken was in. Let the mushrooms cook until they start to brown.
2 Cups Mushrooms, 1 Tablespoon Butter
Add the onions and continue to cook until the onions have started to brown.
1 Small Yellow Onion
Add the garlic and cook another 1-2 minutes until the garlic becomes fragrant.
3 Cloves Garlic
Dust the remaining arrowroot starch over the vegetables and cook until the flour is no longer dry.
1 Tablespoon Arrowroot Starch
Pour in the chicken stock, wine and spices.
1 Teaspoon Salt, ½ Teaspoon Pepper, ½ Teaspoon Thyme, 1 ½ Cups Chicken Stock, 1 ½ Cups Dry Marsala Wine