Place 6 eggs in a saucepan and cover with cold water by about an inch. Bring to a boil, then reduce the heat to a gentle simmer and cook for exactly 7 minutes for a slightly jammy yolk. Transfer the eggs immediately to an ice bath and let them sit for 5 minutes before carefully peeling them.
In a bowl, combine the ground pork sausage, dijon mustard, chives, salt, pepper, and ground sage. Mix well with your hands until everything is evenly incorporated. Divide the mixture into 6 equal portions.
Preheat your oven to 400 degrees F and line a baking sheet with parchment paper. Flatten each sausage portion into a thin patty in the palm of your hand.
Place a peeled egg in the center and carefully wrap the sausage around the egg, pressing and smoothing to seal it completely with an even layer.
Set up a breading station with three shallow bowls. Place the gluten free flour in the first, beaten eggs in the second, and gluten free panko breadcrumbs in the third.
Roll each sausage-wrapped egg in the flour, then dip in the beaten egg, and finally roll in the panko breadcrumbs, pressing gently to make sure the crumbs adhere well. Place on the prepared baking sheet.
Spray the scotch eggs generously all over with cooking spray. Bake for 30 to 35 minutes, turning them over halfway through, until the sausage is fully cooked and the breadcrumb coating is deeply golden and crunchy.
Let them rest for 5 minutes before cutting in half to reveal the egg inside. Serve warm with your favorite mustard.