Steamed Mussels with Spicy Red Pepper Aioli

To make the aioli:

Place the red pepper on an open flame or grill. Turn to blacken on all sides. When fully charred, remove to a bowl and cover with plastic wrap. Let pepper cool, until you can handle it comfortably. Using your fingers, remove blackened skin to reveal the red color underneath. (A paper towel will wipe off what you can't remove with your fingers.) Coarsely chop the pepper and place it in the bowl of a food processor. Add the yolks, garlic, vinegar, chili paste, and salt to taste. Puree until the mixture is homogeneous. While the machine is running VERY slowly drizzle in the oil, until incorporated. Check the aioli for texture and flavor. If it's too thick, add a few drops of water to thin it down, or on the flip side if it's too thin add more oil. The desired outcome is a fairly thin aioli. Check the flavor and add more salt or chili paste, if desired. Refrigerate until ready to use.