Basil Pesto Soubise

Ingredients

• In a heavy-bottomed pot, heat the butter.
• Add the slivered onions to the warm butter. Cook over low heat for 30 minutes, or until the onions are very soft. (Avoid getting any color on the onions.) Add a small amount of water if necessary.
• Transfer the cooked onions to a blender.
• Add the remaining ingredient to the blender and puree until very smooth.