In a large mixing bowl, combine the warm water, quick-rise yeast, and sugar. Stir gently and let it sit for about 5 minutes, or until it becomes frothy.
Add 1/4 cup of the melted buttermilk to the yeast mixture. Stir well to combine the ingredients.
In another bowl, whisk together the flour, salt, and Lawry's seasoning garlic salt. Gradually add this dry mixture to the wet mixture, stirring until a dough starts to form.
Transfer the dough onto a lightly floured surface. Knead the dough for about 5-7 minutes until it becomes smooth and elastic. If the dough is too sticky, sprinkle a little more flour as needed.
Place the kneaded dough in a greased bowl, cover it with a kitchen towel, and let it rise in a warm place for about 30 minutes, or until it doubles in size.
While the dough is rising, mix together the grated Parmesan, mozzarella, and cheddar in a bowl. Set aside for the topping.
Once the dough has risen, punch it down to release the air. Divide the dough into equal pieces, about 12-15, depending on your preferred size. Roll each piece into a long, thin stick and place them on a greased baking sheet or one lined with parchment paper.
Cover the shaped breadsticks with a kitchen towel and let them rise for another 15-20 minutes.
Preheat your oven to 375°F (190°C). Once the breadsticks have risen, brush them with the remaining melted buttermilk.
Sprinkle the cheese mixture generously over the top of each breadstick, making sure to cover them well. Bake in the preheated oven for about 15-20 minutes, or until the breadsticks are golden brown and the cheese is bubbly.
Once baked, remove the breadsticks from the oven and let them cool slightly. Serve warm with marinara sauce or your favorite dipping sauce!