Cut the mushrooms into very small cubes. Very carefully crumble the yeast into the butter or margarine and stir over low heat until bubbles form and a creamy consistency forms. Add salt and pepper. Gradually add the mushrooms, stirring constantly, allow to evaporate a little. The ingredients should mix, but the mushrooms should stay firm to the bite (don`t let the color put them off!). Remove from heat after about 5 minutes. Let cool and mix in the herbs loosely. Mix with the butter in a bowl.
The spread tastes wonderfully of mushrooms and forest, best on a garlic baguette.