Preheat oven to 300°F
Pat country style ribs dry
Season ribs with salt, black pepper, garlic powder, and paprika
Heat oil in a skillet over medium-high heat
Sear ribs on all sides until browned
Place ribs in a baking dish or roasting pan
Add sliced onions or garlic if desired
Brush ribs with barbecue sauce or your preferred seasoning mix
Cover tightly with foil
Bake for 2.5 to 3 hours until tender
Uncover during the last 20 to 30 minutes if you want the sauce to thicken
Check that the ribs are fork-tender before serving
Rest for 10 minutes before serving