Burgers Juicy Pub Style

Juicy Pub Style Burgers Recipe source: American Test Kitchen
Ingredients: Serve 4
2 pounds sirloin steak tips, trimmed of excess fat and cut into ½ inch chunks
4 tablespoons unsalted butter, melted and cooled slightly
Salt and Pepper
1 teaspoon vegetable oil
4 hamburger rolls, toasted and buttered

Procedures:

• Place beef on baking sheet in single layer. Freeze meat until starting to harden around edges but sill pliable, about 35 minutes.
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• Place one quarter of meat in food processor and pulse until ground into 1/16 inch pieces, about 35 one second pulses, stopping and redistributing meat around bowl as necessary to ensure beef is evenly ground. Transfer meat to second baking sheet. Repeat grinding with remaining 3 batches of meat. Spread meat over sheet and discard any long strands of gristle or large chunks of hard meat or fat.
• Adjust oven rack to middle position and heat oven to 300 degrees. Drizzle melted butter over ground meat and 1 teaspoon pepper. Gently toss with fork to combine. Divide meat into 4 lightly packed balls. Gently flatten into patties ¾ inch thick and about 4 ½ inches in diameter. Refrigerate patties until ready to cook. (patties can be refrigerated, covered, for up to 1 day)
• Season 1 side of patties liberally with salt and pepper. Using spatula, flip patties and season other side. Heat oil in 12 inch skillet over high heat until just smoking. Using spatula, flip patties and season other side. Heat oil in 12 inch skillet over high heat until just smoking. Using spatula, transfer burgers to skillet and cook without moving for 2 minutes. Using spatula, flip burgers and cook for 2 minutes longer. Transfer patties to rimmed baking sheet and bake until burgers register 125 degrees for medium rare or 130 degrees for medium, 3 to 6 minutes.
• Transfer burger to plate and let rest for 5 minutes. Transfer to rolls, add desired toppings, and serve.

Pub Style Burger Sauce
Ingredients:
¾ cup mayonnaise
2 tablespoons soy sauce
1 tablespoon dark brown sugar
1 tablespoon Worcestershire sauce
1 tablespoon minced fresh chives
1 medium garlic clove, minced
¾ teaspoon pepper

Procedures:
Whisk all ingredients together in bowl.

Variation:
Juicy Pub Style Burger with Crispy Shallots and Blue Cheese
Follow step 1 of recipe for juicy Pub style Burgers. While beef is in freezer, heat ½ cup vegetable oil and 3 thinly sliced shallots in medium saucepan over high heat; cook, stirring frequently, until shallots are golden, abut 8 minutes. Using slotted spoon, transfer shallots to pepper towel lined plate, season with salt, and set aside. Proceed with recipe, topping each burger with 1 ounce crumbled blue cheese before transferring to oven. Top burgers with Pub Style Burger Sauce and crispy shallots just before serving. End.