Season the shrimp. In a small bowl, combine paprika, all-purpose seasoning, dried thyme, dried oregano, scotch bonnet peppers, and salt and pepper. Coat shrimp with the seasoning mixture. Then add onions and scallion and set aside.
Prepare finishing oil. In another bowl, stir together 1 tbsp of oil, red pepper flakes, chopped cilantro, fresh thyme, and 1/2 of the lemon juice and zest. Set aside.
Heat 1 tbsp of oil in a large cast iron over medium flame. Add minced garlic, Worcestershire sauce, remaining lemon juice and zest. Cook until sauce starts to bubble, about 1 minute.
Discard onions, scallions, and excess scotch bonnet peppers from shrimp (we only needed them to season the shrimp), then add shrimps to skillet. Cook until shrimps turn pink, about 3-5 minutes. Add red food coloring, making sure to stir to ensure the coloring is evenly distributed.NOTE: I used a naturally derived liquid food coloring that was a bit thick, so I added a little bit of water to the coloring before adding it to the pot in order to dissolve it. Depending on the kind of food coloring you use, you may need more or less to schieve the desired color. Remove from stove and top with finishing oil. Serve immediately.