Purée all the ingredients, except the mushrooms, in a blender until smooth.
Marinate the mushrooms overnight.
Preheat the broiler on the highest setting.
Place the mushrooms and 2 to 4 tablespoons of the marinade into a thin roasting pan. The mushrooms should not be deeper than 2 mushroom slices. You can also use a soufflé dish or a stainless-steel baking pan.
Portion some of Sage’s Carrot Butter Pâté (see recipe) in either the same roasting pan or in a separate roaster. Broil both the mushrooms and the carrot butter for approximately 8 minutes.
Serve with toasted baguette slices.
Makes: 8 to 10