In a large bowl or the bowl of a stand mixer, dissolve the yeast and sugar in the warm water. Let sit until foamy and bubbly.

Add the salt, oil, and two cups of flour, and mix to combine.

Add the remaining flour, 1/4 cup at a time, to form a soft dough that pulls away from the sides of the bowl.

Knead until smooth, then place in a greased bowl, cover and let rise for one hour.

After the dough has risen, gently punch it down and divide it into 16 equal pieces.

Roll each piece into a 12 inch rope, then cut a 2-3 inch slit on each side of the rope.

Roll the dough on either side up the slit into a spiral, in opposite directions, to make a bone shape.

Place the breadsticks on a greased or parchment lined baking sheet.

Cover and let rise for 45 minutes to an hour, until doubled in size.

During the last 10 minutes of rise time, preheat the oven to 425°F.

Bake 12-14 minutes, until golden brown.

Remove from the oven and brush with the melted butter, then sprinkle with garlic salt and parmesan.

Serve warm with marinara sauce.