Prepare vegetables reminiscent of a forest, such as mushrooms, broccoli, and spinach.
Melt butter in a pot and sauté chopped onions.
Add the prepared vegetables and stir-fry evenly.
Pour in chicken or vegetable stock and bring to a boil.
Reduce the heat and simmer until the vegetables are cooked through.
Season with salt and pepper to taste.
Blend until smooth, depending on your desired texture.