The Steakhouse Stack Snack

Name: The Steakhouse Stack Snack
Ingredients: Steak; 1 2 to 2 1/2-pound beef flank steak; 1/2 teaspoon kosher salt; 1/4 teaspoon freshly ground black pepper; 3 tablespoons olive oil; 1 tablespoon onion powder; 1 tablespoon hot Hungarian paprika; 2 teaspoons garlic powder; 6 to 8 sprigs fresh thyme, leaves stripped and chopped; 1/2 cup mayonnaise; 1/2 cup prepared horseradish; 1/4 cup sour cream; 4 teaspoons grated lemon peel (peel from 1 lemon); Kosher salt (optional); 60 Keebler® Town House® Original crackers; 1/4 cup chopped fresh chives