Baltimore Pit Beef | America's Test Kitchen

Ingredients

• 1/2 cup mayonnaise
• 1/2 cup hot prepared horseradish
• 1 teaspoon lemon juice
• 1 garlic clove, minced
• Salt and pepper
• 4 teaspoons kosher salt
• 1 tablespoon paprika
• 1 tablespoon pepper
• 1 teaspoon garlic powder
• 1 teaspoon dried oregano
• 1/4 teaspoon cayenne pepper
• 1 (4- to 5-pound) boneless top sirloin beef roast, trimmed and halved crosswise
• 10 kaiser rolls
• 1 onion, sliced thin