Big Mac Sloppy Joes w KnockOff Secret Sauce

Ingredients

• 1 tablespoon (15 ml) olive oil
• 1 large yellow onion, finely chopped (approx. 1 cup)
• 1 green bell pepper, finely chopped (approx. 1 cup)
• 1 1/2 pounds (680g) ground beef (80/20 blend recommended for flavour)
• 1 teaspoon garlic powder
• 1 teaspoon onion powder
• 1/2 teaspoon smoked paprika
• 1/2 teaspoon salt, or to taste
• 1/4 teaspoon black pepper, or to taste
• 1/4 cup (60 ml) ketchup
• 2 tablespoons (30 ml) yellow mustard
• 2 tablespoons (30 ml) sweet pickle relish, drained
• 1 tablespoon (15 ml) Worcestershire sauce
• 1/2 cup (120 ml) beef broth
• 1 cup (240 ml) mayonnaise
• 2 tablespoons (30 ml) sweet pickle relish, finely chopped
• 1 tablespoon (15 ml) yellow mustard
• 1 tablespoon (15 ml) white vinegar
• 1/2 teaspoon onion powder
• 1/4 teaspoon smoked paprika
• 6 hamburger buns, toasted
• 1 cup shredded iceberg lettuce
• 1/2 cup dill pickle slices, thinly sliced