In the saucepan with bacon drippings, place onion & sauté until translucent. Add garlic & sausage; sauté for a couple of minutes. Remove from pan to a dish. Add half of the perogies to the pan & cook for 3-4 minutes per side or until browned. Repeat the process with remaining perogies. Place bacon, onions & garlic in the pan & stir to combine.