Steakhouse Swiss Burger

Ingredients

• 0 Vegetable Oil, for grilling
• ¾ lb Ground Sirloin
• ¾ lb Ground Chuck
• 0 Kosher Salt, to taste
• 0 Freshly Ground Pepper, to taste
• 8 Swiss Imported Slices
• ¼ cup Extra-Virgin Olive Oil
• 2 Large Egg Yolks
• 1 Shallot, Coarsely Chopped
• 4 Cloves Garlic, Peeled and Smashed
• 1 tbsp White Wine Vinegar
• 1 tbsp Whole Black Peppercorns
• 1 tsp Fresh Lemon Juice
• ½ tsp Kosher Salt
• 4 Pretzel Hamburger Buns, split and lightly toasted
• 3 cups Baby Arugula
• 1 cup Fried Onions, homemade or store-bought