Spray a baking dish with the baking spray & let it rest.
Preheat oven to 200C.
Heat the oil & melt the butter in a frying pan.
Add the garlic & onion to the frying pan & season them with salt & pepper. Cook them for 5 minutes over high heat, stirring occasionally.
Add the red wine, stock cube, tomato paste, oregano & cherry tomatoes to the pan. Cook them for 5 minutes over medium to high heat, stirring occasionally.
Add the tomato sauce to the pan & bring to boil. Simmer for 20 minutes.
In the baking dish start by first spreading some tomato sauce on the bottom & then layering a layer of ravioli. Cover them with some of the tomato sauce & continue layering the ravioli with the tomato sauce on top until you have no more ravioli left. Finish with the tomato sauce on top.
Cover the dish with aluminium foil & cook in the oven for 30 minutes.
Remove the foil & spread the mozzarella slices on top. Continue cooking in the oven for 15 minutes.