Peruvian Aji Verde

From skinnytaste 
 
 Ingredients 
 
 2 tablespoons olive oil 
 50 g chopped red onion 
 100 g light Hellman’s mayonnaise 
 2 tablespoons lime juice 
 4 teaspoons yellow mustard 
 1/2 teaspoon salt 
 1/4 teaspoon freshly ground black pepper 
 85 g jalapeños 
 60 g chopped fresh cilantro leaves and stems 
 3 medium cloves garlic 
 
 Method 
 
 Saute the onion in a small skillet with 1 teaspoon of the oil until soft, 3 to 4 minutes. 
 Transfer to the blender then add the remaining oil, mayo, vinegar, mustard, salt and pepper. 
 Then add the chopped jalapeno, cilantro and garlic and blend on high speed until the sauce is smooth and creamy, about 30 seconds.