In a large bowl, spread the pork out and sprinkle evenly all over with the brown sugar, fennel seeds, rosemary, sage, thyme, pepper flakes, nutmeg, 3/4 teaspoon salt and a few good turns of pepper. Mix with your hands to combine, being careful not to over mix. Divide into 4 parts and roll into balls. Create a large divot in the center of each ball and fill each with 1 slice of the cheese that’s been folded into 4 quarters. Seal in the cheese by pressing the edges of the divot together and then press the ball into patties. Season on both sides with salt and pepper.
Heat a lightly oiled nonstick pan over medium-high heat and cook until the patties have an internal temperature of 165 degrees F, about 4 to 5 minutes on each side. Remove to a plate and set aside.
Add a drizzle of oil to the pan. Crack in the eggs, cover and cook to the desired doneness. (I like a firm yolk with these since the cheese will lend enough ooze!) Season with salt and pepper.
Butter the English muffins and place on a parchment paper-lined sheet tray. Place in the oven and toast until lightly golden, about 3 to 5 minutes.
Top each English muffin with a patty, an egg and sriracha or hot sauce, if desired. Enjoy!