Place a pan over medium-low heat. Add oil, followed by diced onion. Caramelize onions, stirring occasionally, about 12 to 15 minutes.
Stir in grated garlic and continue tocook for 1 minute. Remove from heat and set aside to slightly cool.
In a mixing bowl combine Greek yogurt, kewpie, caramelized onions, cornichons, crumbled bacon, and finely shredded cheddar. Season with salt and pepper.
Fold together until combined.
Top with sliced chives and serve.
