Preheat the oven to 180C/350F.
For the mash, add the potatoes to a large pot of cold heavily salted water and bring to a boil. Cook until knife tender, then drain and leave to sit in the colander for 1 minute. Mash with the butter, cream and plenty of salt and pepper (to taste).
Pulse the bread in a food processor until it forms a crumb-like texture. Alternatively, just slice it into small cubes. In a large bowl mash together the bread, milk, grated onion and Worcestershire sauce until the bread absorbs the liquid. Add the remaining meatloaf ingredients and use your hand to combine everything. Whilst it's important that everything is well-incorporated, don't squeeze the meat into oblivion or it will come out tough and chewy.
Lightly spray the muffin tin with oil and divide the meat into 8 pieces. Roll into balls and gently press into the muffin tin. Bake for 15 minutes. Meanwhile, combine the glaze ingredients in a small bowl.
Remove the tray and raise the temp to 200C/400F. Carefully tip the tray to remove excess fat if needed, then spoon over the glaze. Place back in the oven for 8-10mins until the glaze begins to lightly caramelize and the meat is piping hot right through the centre.
Rest for 5 mins, then add the mash on top. Garnish with chives then tuck in and enjoy!