Place oysters on a large tray. Season oysters evenly with salt, pepper, and lemon juice. Top each shell with equal amounts of parsley and green onions.
On an open flame grill, heat coals or gas to a medium to hot. Depending on the grill, there are 3 methods of completing this dish. Ideally, the bacon should sit above the oysters, cooking on an elevated metal mesh that allows the bacon grease to drip into the oyster cavity. The oysters should be placed directly above the flame.
If an elevated mesh apparatus or shelf is unavailable, the bacon can be elevated with crumpled aluminum foil, allowing the same dripping effect.
If foil is unavailable, place the bacon strips around the edge of the shells so that they are allowed to cook separately from the oysters while still producing drippings.
Cook the oysters for 8 to 20 minutes. For best results, make sure that at least some bacon fat has found its way into the oyster cavity. Serve as appetizers eaten off the shell or with a small cocktail fork.
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