4. Pour the peanut butter mixture into the oat mixture and stir until well combined. Transfer the mix to the prepared pan and press the mixture into an even layer. Sprinkle over the remaining chocolate chips, lightly pressing them into the base, and freeze for 15 minutes to allow the mixture to set. Remove from the pan and cut into 24 bars, then transfer to an airtight container and freeze. When ready to eat, remove from the freezer and allow to thaw slightly, 2 to 3 minutes, before enjoying.
Toast the bread slightly, 1 to 2 minutes. Crack an egg into the hole in each piece of toast and sprinkle the eggs with salt and pepper. Cook the eggs until set on the bottom, 2 to 3 minutes. Using a spatula, carefully flip the toast with the egg, season the other side and spread with the mayonnaise mixture. Top each with a slice of cheese to slightly melt and cook until the egg is the desired doneness. Remove to a cutting board and repeat with the remaining butter, toast, eggs, mayo mixture and cheese. To build the sandwiches, divide the bacon between 2 of the egg-in-a-hole toast pieces, on top of the cheese. Top each with some tomato slices and lettuce, then top with a remaining egg-in-a-hole toast piece. Serve immediately or wrap in foil to keep warm.
Slowly pour the egg mixture all over the top. Cover with plastic wrap and refrigerate overnight. Remove the pan from the fridge 20 to 30 minutes before baking. Preheat the oven to 350ºF. Replace the plastic wrap on top of the casserole with aluminum foil. Bake for 35 to 40 minutes, then remove the foil and continue to bake until the top is golden brown and slightly crisp, 10 to 15 minutes more. Sprinkle with the chopped parsley. Serve warm and enjoy.