Preheat oven to 400 degrees.
On a sturdy, rimmed baking sheet place three long pieces of foil. One length-wise and two horizontal.
Place one rib slab on foil. Drizzle with oil and rub with Cavender's Greek Seasoning. Then place other rib slab directly on top of it. Drizzle with oil and rub with Cavendar's Greek Seasoning.
Wrap horizontally with foil first, then vertically.
Bake in oven for one hour.
Take out of oven and let sit for 10-15 minutes.
Heat grill to high.
Remove ribs from foil and place on another large baking sheet.
Brush both slabs with barbeque sauce. Place on grill for 5 minutes each side and take off. (This allows you to basically create a crust with the sauce.)
Either serve as whole slabs or cut and serve.
Serve with an entire roll of paper towels.