Preheat the oven to 450º. Cover the potatoes with salted cold water in a saucepan. Bring to a boil over medium-high heat and cook until tender which is about 8 minutes then drain and set aside.
Combine the rosemary leaves, garlic, salt, and the red pepper flakes. Transfer the paste to a bowl. Stir in the juice of 1 lemon and the olive oil. Add the chicken and turn to coat.
Heat a large cast-iron skillet over medium-high heat. Add the chicken, skin-side down, cover and cook until the skin browns, about 5 minutes. Turn the chicken then add the mushrooms and potatoes to the skillet and drizzle with the remaining lemon juice.
Add the rosemary sprigs and the squeezed lemon halves to the skillet then transfer to the oven and roast, uncovered, until the chicken is cooked through and the skin is crisp about 20 minutes.
In a large pitcher, mix together the brandy, lemon juice, lemonade concentrate, orange juice, red wine, triple sec, and sugar. Float slices of lemon, orange, lime, and maraschino cherries in the mixture. Refrigerate overnight to let flavors infuse.
1 cup fresh breadcrumbs made from crustless French bread
Directions:
Melt butter in small skillet over medium heat. Add flour; whisk 2 minutes. Add cream slowly and whisk until mixture thickens slightly. Cook for a few minutes stirring lightly. Remove from heat and set aside.
Sauté bacon in heavy large skillet over medium heat until crisp, about 6 minutes. Transfer bacon to paper towels to drain.
Discard all but 2 tablespoons of drippings from skillet. Add leeks, celery, bay leaf, and cayenne to skillet and sauté over medium heat until vegetables are soft, about 12 minutes. Add wine and cook until absorbed, about 15 seconds.
Add cream mixture and bring to simmer. Stir until leek mixture thickens slightly, about 3 minutes. Stir in bacon and cheese. Season generously with salt and pepper.
Cool slightly. Cover and refrigerate. (Can be made 1 day ahead).
Place 1 oyster on each of 20 oyster shells or ramekins. Top oyster in each shell with 2 tablespoons leek mixture. Place on rimmed baking sheet. Cover and chill. (Can be made 4 hours ahead).
Preheat oven to 500°F.
Divide breadcrumbs among shells or ramekins. Bake until leek mixture bubbles and crumbs are golden, about 8 minutes.