Slice the red apples into rings. Bring the water to a boil on the stove, then optionally add in the sprig of mint, cardamom, and vanilla bean caviar. Place the apple rings in the boiling water and let them cook briefly. Once the apples have cooked, turn off the stove and add the grenadine to the hot water, then transfer everything to a jar. Seal the jar, transfer it to the refrigerator, and let the apples sit overnight.
Mix together 4 portions of the wet ingredients. In a separate bowl, mix together 4 portions of the dry ingredients. Gradually add the wet ingredients to the dry ones, stirring continuously until a smooth batter forms. Transfer the batter to the refrigerator and let it chill for 30 minutes. Preheat the oven to 325°F.
Pour 2 portions, or ½ of the total pancake batter into a non-stick oven-safe frying pan that's at least 2 inches deep. Sprinkle sesame seeds on top of the pancake batter, then transfer the frying pan to the oven and bake at 325°F for 25 minutes. Once the pancake burger bun has baked, remove it from the oven and slice it like a bun.
Crush the Oreos in a food processor, then mix them with 1 portion, or ¼ of the total pancake batter. Heat up a frying pan with vegetable oil on the stove, then pour the Oreo pancake batter through the potato ricer into the hot vegetable oil. Cook the pancake burger patty for 5 minutes on the first side, then flip it over and cook for 3 minutes on the other. Once it has cooked, remove the pancake burger patty from the pan and let it cool for 20 minutes.
Mix the pureed mango and marshmallows with 1 portion, or ¼ of the total pancake batter. Heat a grill pan on the stove, then pour the mixture into it and cook the marshmallow cheese on low heat until it's golden brown on each side. Once the marshmallow cheese has cooked, turn off the heat, place a lid on the grill pan, and let it sit for 5 minutes.
For the ketchup, either transfer the mixture used to pickle the apples mixed with some applesauce, or pre-made strawberry applesauce to an empty squeeze bottle. For the mayo, combine the cream cheese and coconut milk in another squeeze bottle, and for the mustard transfer the applesauce to an empty squeeze bottle. Shake everything together well.
To assemble the pancake cheeseburger, squirt the sauces onto the bottom half of the pancake bun along with some fresh mint leaves. Add the pancake burger patty on top, then place the pickled apple tomatoes, marshmallow cheese, and more sauce on top. Finish the whole thing off with the top half of the pancake bun and dig in!