Here's how to make the best hot dog toppings happen: 1. Spice up classic condiments Old Bay Mayo: Stir 2 Tbsp. fresh lemon juice and 1 tsp. Old Bay seasoning into 1/2 cup mayonnaise; adjust to taste. Harissa Ketchup: Stir 1 tsp. harissa paste into 1/2 cup ketchup; adjust to taste. Maple Mustard: Stir 1/4 cup maple syrup into 1/4...