Creating Big Mac Pizza with Crispy Sesame Seed Crust is straightforward if you follow these easy steps:

1. Preheat Oven: Preheat your oven to 475°F (245°C). This high temperature will give your pizza a crispy crust.
2. Prepare the Dough: Roll out the pre-made pizza dough on a floured surface to your desired thickness.
3. Add Sesame Seeds: Brush the dough with olive oil and sprinkle sesame seeds evenly over the top.
4. Pre-Bake the Crust: Place the dough on a pizza stone or baking sheet and pre-bake for about 5-7 minutes until it just starts to firm up.
5. Cook the Ground Beef: In a skillet over medium heat, cook the ground beef until browned. Drain any excess fat and season with garlic powder, onion powder, salt, and pepper.
6. Add Onions: Stir in the diced onions with the cooked ground beef and cook for an additional 2-3 minutes until softened.
7. Spread Pizza Sauce: Remove the pre-baked crust from the oven and spread the pizza sauce evenly over it.
8. Layer the Cheese: Sprinkle the shredded mozzarella cheese generously over the sauce, followed by the cheddar cheese.
9. Top with Beef Mixture: Evenly distribute the ground beef and onion mixture over the cheese.
10. Add Pickles: Place the sliced pickles on top of the beef for that classic Big Mac flavor.
11. Drizzle Mustard and Ketchup: Drizzle mustard and ketchup over the toppings as desired.
12. Bake the Pizza: Return the pizza to the oven and bake for an additional 15-20 minutes, or until the cheese is bubbly and the crust is golden brown.
13. Cool Slightly: Allow the pizza to cool for 5-10 minutes before slicing. This helps the cheese set a bit.
14. Garnish: If you prefer, top with shredded lettuce for added freshness before serving.

These steps will guide you in creating this incredible pizza effortlessly.