Preheat your oven to 190°C (375°F). Line a baking tray with parchment paper to prevent the rolls from sticking.
Open the crescent roll dough package and carefully separate the dough into individual triangles. Arrange them on a clean working surface.
In a small bowl, combine mayonnaise and Dijon mustard. Mix until smooth and creamy. This mixture adds a delicious tangy flavor to the rolls.
Spread a thin layer of the mayonnaise and mustard mixture over each dough triangle. Place one slice of ham and one slice of cheese on top.
Starting from the wider end, carefully roll each dough triangle toward the pointed end. Tuck in the edges slightly to help keep the filling inside.
In a small bowl, combine melted butter, garlic powder, dried parsley, and black pepper. Mix well.
Arrange the prepared rolls on the lined baking tray. Brush the tops with the seasoned melted butter. Sprinkle sesame seeds over them if desired.
Place the tray in the preheated oven and bake for approximately 15–20 minutes, or until the rolls become golden brown and the dough is completely cooked.
Remove the rolls from the oven and allow them to cool for a few minutes. Serve warm with ketchup, honey mustard, mayonnaise, or your favorite dipping sauce.