-Heat a skillet over medium-high heat. Add 2 tablespoons of oil and let heat up. Sauté onions until just translucent – split ½ of the onion out and let cool in a bowl to add to the burger mixture.
-Add garlic to the onion left over in the pan and cook until fragrant. Add chilies and sauté for 2 minutes, reduce heat and let simmer, stirring occasionally until juices are rendered and chilies are just tender.
-Toss in a little salt and pepper, set aside and let cool slightly. When the mixture is cool enough fold in goat cheese to form an even mixture.
-In a bowl combine beef, pork, garlic, tarragon, parsley, salt and pepper to taste, being careful not to over mix. Add ½ of the sautéed onions once cooled.
-Form 8 very thin patties, about ½ inch or less thick. Place a rounded spoonful of cheese mixture in the center of a patty, top with a second patty and seal the edges. Grill burgers over medium-high heat for 4 minutes on each side for a medium done.