Cut both ends off the yellow onion and cut evenly into 2 halves. Remove and discard skin. Place onion halves on a cutting board with cut-sides down. Make vertical slices against the grain, then turn and slice across the cuts to chop. Chop again if you’d like smaller pieces. You should have about 2 cups chopped onion.
Heat olive oil in a large skillet over high heat. Transfer onion and salt into the hot oil. Cook until onions are deep brown in color, 7 to 8 minutes. Add shallots and red onions; stir and saute until they start to soften and sweeten, 3 to 4 minutes. Turn off the heat and stir in garlic and dried onion. Set aside to cool completely, about 20 minutes.
Combine mayonnaise, sour cream, pepper, cayenne, and cooled onion mixture; mix until thoroughly combined. Cover and chill in the refrigerator for 4 to 12 hours, or overnight.
Remove dip from the refrigerator and stir in green onions and chives. Taste and adjust seasoning. Transfer dip into a serving bowl and garnish with more green onions and chives to serve.
Try to get the thickest, firmest sour cream you can buy. You can make this with all sour cream (instead of mayonnaise) but I think it’s better with mayonnaise and sour cream.
Source: Read Full Article