In a medium skillet, melt the butter over medium heat. Add the garlic and saute for 2 minutes; remove from heat.
Place the bread crumbs in a mixing bowl and add half the garlic butter, set aside.
To the remaining garlic butter in the skillet, add the shallots and spinach and cook for 3 minutes until the spinach wilts. De-glaze the pan with Pernod or white wine. Season with salt and pepper, add a dash of hot sauce. Allow the mixture to cook down for a few minutes.
Finish off the bread crumbs by mixing in the olive oil, Parmesan and parsley. Season with salt and pepper.
Spoon 1 heaping teaspoon of the spinach mixture on each oyster followed by a spoonful of the bread crumb mixture. Sprinkle a baking pan amply with rock salt. Arrange the oysters in the salt to steady them. Bake in a pre-heated 450°F. oven for 10 to 15 minutes until golden.