In a large skillet over medium heat, brown ground beef and onion Stirring occasionally. Season with salt and pepper. Once the beef is browned and the onions are soft, drain excess grease.

Stir in Thousand Island dressing.

The prepared beef mixture can then be transferred to a crockpot and kept warm on the low setting.

Shred lettuce, dice tomatoes, pickles and any other toppings you desire!

The pita pockets can be warmed in the oven or microwave, though this step is optional.