In a large mixing bowl, combine warm water, yeast, sugar, and salt. Let the mixture rest for 5-10 minutes until it becomes bubbly.
Using the dough hook attachment on your mixer, gradually add the flour. Mix until the dough forms a loose ball.
Cover the mixing bowl with a dish towel and allow the dough to proof for 30-45 minutes, or until it has doubled in size.
Preheat your oven to 350°F (175°C).
Prepare a sheet pan by lining it with parchment paper for easy cleanup. Pour half of the melted butter onto the bottom of the pan.
Place the dough in the center of the sheet pan. Starting from the middle, press the dough outward toward the edges until it covers the bottom of the pan.
Pour the remaining melted butter over the top of the dough, ensuring the entire surface is covered. Evenly sprinkle Parmesan cheese, garlic salt, and Italian seasoning over the top.
Let the dough rest for 15-20 minutes, allowing it to rise to about 1-inch thick.
Using a pizza cutter, slice the dough into breadsticks of your preferred size.
Bake the breadsticks for 18-20 minutes, or until they are lightly golden around the edges.
Remove from the oven and let the breadsticks cool for a few minutes before serving.