In a medium bowl, mix the flour, baking powder, baking soda, salt, and sugar. Cut in 1/2 cup of shortening with pastry blender, until the mixture resembles coarse crumbs.
Add in 1 cup of buttermilk and 1/2 cup of grated cheese. Mix until just combined.
Turn out onto floured surface. Gently roll dough in flour. DO NOT KNEAD! Pat into a circle about 3/4 an inch thick.
Cut into 12 squares or use a round biscuit cutter and cut into 12 circles.
Place biscuits on top of the filling. Three line of four biscuits. Leave space in between as they will rise.
Melt 1/4 cup butter in microwave safe bowl. Add 1 teaspoon garlic salt. Brush biscuit tops with half
the garlic butter mixture. Save remaining for after baking.
Bake in oven for 45-50 minutes until biscuits are golden brown and filling is bubbling around the edges of the dish.
Remove from oven. Brush remaining garlic butter on top of baked biscuits. Cool for 10 minutes before serving.