Preheat the oven to 375°F. Add the potatoes to a large pot and cover with cold water. Add a large pinch of salt. Bring the water to a boil. Reduce to a simmer and cook the potatoes for about 8-12 minutes, or until just fork tender.
Meanwhile, lay the bacon onto a sheet pan in an even layer. Bake for about 25-30 minutes, or until crisp. Transfer the bacon to a plate lined with paper towels and allow to drain.
Increase the oven temperature to 450°F. Drain the potatoes and transfer them to a bowl of ice water for a couple of minutes. Once cool, transfer the potatoes to paper towels and let fully dry. Use your hands or a measuring cup to smash the potatoes flat. Transfer them to the sheet pan in the bacon fat. Drizzle olive oil over top to coat them well. Season with a generous pinch of salt. Roast the potatoes for about 20-25 minutes until crisp, flipping halfway through.
Meanwhile, whisk together the sour cream and lemon juice in a small mixing bowl. Stir in the lemon zest, chives, and scallions. Season with salt to taste. Crumble the bacon into small pieces.
Transfer the potatoes to paper towels to drain. Plate them with the sour cream sauce dolloped over top. Garnish with the bacon, freshly grated parmesan, and lots of freshly ground black pepper.
Preheat the oven to 425 degrees F. Line a baking sheet with parchment paper.
In a skillet over medium heat, cook bacon until crisp. Transfer to paper towels and drain excess grease. Chop into small pieces.
In a large mixing bowl, whisk together flour, sugar, baking powder, baking soda, and salt.
Using a food processor, combine butter with the dry ingredients until it resembles a coarse meal. Add in cheese, chives, and bacon. Mix.
Stir in buttermilk until moistened. Using a measuring cup or ice cream scoop, drop 1/2 cup of batter at a time on to the lined baking sheet, spacing the batter about 2 inches apart so the biscuits have room to expand as they bake.
Bake for about 15-20 minutes, or until the biscuits are golden brown. Remove from oven and serve warm.
Salt all sides of the pork shoulder chunks. Heat vegetable oil in a pot over high heat. Brown pork shoulder pieces until surface is seared and crusty, about 3 or 4 minutes per side.
Transfer browned pork to a plate. Add onions to oil and reduce heat to medium and season with a pinch of salt and pepper. Cook and stir about 2 minutes.
Add torn sage leaves; cook until onions soften and begin to brown, stirring frequently. Pour cider into pot; stir to deglaze bottom. Raise heat to high and bring to a boil. Stir in cider vinegar. Reduce heat to low.
Transfer pork shoulder pieces to cider mixture. Cover; simmer gently on low 1 hour. Remove lid and turn pieces over. Cover; simmer on low until meat is fork tender, 1 to 2 more hours. Transfer pork to a bowl with a slotted spoon.
Raise heat to high and bring sauce to a simmer. Whisk in heavy cream. Simmer until liquid is reduced by half and is slightly thickened, 8-10 minutes. Toss in a pinch of cayenne.
Transfer pork back to pot and reduce heat to low. Baste pork with sauce while it heats through and becomes perfectly tender, and the sauce is as thick as you want it, about 15 more minutes.