Preheat oven to 400°F (200°C) and line a baking sheet with parchment paper.
In a large skillet over medium-high heat, brown the ground beef and onions until the meat is fully cooked and onions are translucent.
Drain excess fat and season the beef with garlic powder, salt, and pepper.
Unroll the dough onto a flat surface and press into a 12x8 inch rectangle.
Spread the beef mixture evenly over the dough, leaving a 1-inch border at the edges.
Top the beef with shredded cheddar cheese and chopped pickles.
Roll the dough tightly starting from the long side to form a log, then pinch the seam to seal.
Cut the log into 12 equal slices and place them cut-side up on the prepared baking sheet.
In a small bowl, whisk together the melted butter, minced garlic, and parsley.
Brush the tops and sides of each rollup generously with the garlic butter mixture.
Bake for 12 to 15 minutes, or until the dough is golden brown and the cheese is melted.
Serve warm with optional dipping sauces like ketchup or mustard.