Step 1

Preheat oven to 375 degrees F (190 degrees C).

Step 2

Heat a large skillet over medium-high heat. Cook and stir beef, salt, and pepper in the hot skillet until meat is browned and crumbly, 5 to 7 minutes; drain and discard grease.

Step 3

Mix ketchup and mustard in a bowl; spread mixture over pizza crust. Spread mozzarella cheese and Cheddar cheese over ketchup mixture and top with beef and onions. Transfer pizza to a large baking sheet.

Step 4

Bake in preheated oven until cheese is melted, about 20 minutes. Top with pickles and allow pizza to cool for 5 minutes. Top with shredded lettuce and tomatoes before slicing and serving.