Plus: More Vegetable Recipes and Tips
Roast the pepper under the broiler, until charred all over, about 8 minutes. Transfer to a bowl, cover with plastic wrap and let steam for 5 minutes. Peel and finely chop the pepper.
In a small bowl, mix the roasted pepper with the mayonnaise, capers, parsley and lemon juice. Season with salt and pepper and serve.
The aioli can be refrigerated for up to 3 days.