Ingredients:

  • 2 Tbsp (30g) Unsalted Butter (for gravy)
  • 2 Tbsp (30ml) Olive Oil (for gravy)
  • 2 large (approx. 400g) Onions (Yellow or Red), thinly sliced
  • 1 tsp (5g) Fine Sea Salt (for caramelizing)
  • 2 cloves Garlic, minced
  • 1 Tbsp (15ml) Balsamic Vinegar
  • 2 Tbsp (30g) Plain/All-Purpose Flour
  • 50ml (3 Tbsp) Dry Red Wine (optional)
  • 600ml (2 ½ cups) High-quality Beef Stock (low sodium)
  • 1 tsp (5ml) Worcestershire Sauce
  • ½ tsp Fresh Thyme leaves
  • Freshly ground Black Pepper, to taste
  • 8 Large High-Quality Pork Sausages (Bangers)
  • 1 Tbsp (15ml) Vegetable Oil (for sausages, optional)
  • 1 kg (2.2 lbs) Starchy Potatoes (Maris Piper, Russet, or Yukon Gold), peeled and quartered
  • 120ml (½ cup) Full-fat Milk or Single Cream (heated)
  • 85g (6 Tbsp) Unsalted Butter, cut into cubes (room temperature)
  • 1 Tbsp (15g) English Mustard (or Dijon)
  • 1 tsp Fine Sea Salt (for mash)
  • Freshly ground White Pepper, to taste

Instructions:

  1. Caramelize the Onions: Melt butter and oil in a heavy pot over medium-low heat. Add the sliced onions and salt. Cook slowly for 25–30 minutes, stirring occasionally, until the onions are deep golden brown and sticky. This low-and-slow process is non-negotiable for rich gravy.
  2. Aromatics and Deglazing: Stir in the minced garlic for 1 minute. Add the balsamic vinegar and red wine (if using), scraping up any caramelized bits (fond) from the bottom of the pan. Let the liquid reduce by half.
  3. Make a Roux and Simmer: Sprinkle the flour over the onions and stir well for 2 minutes to cook out the raw flour taste. Gradually whisk in the cold beef stock until smooth. Add the Worcestershire sauce and thyme. Bring to a gentle simmer, then cook uncovered for 15–20 minutes until the gravy has thickened and reduced slightly. Taste and adjust seasoning. Keep warm.
  4. Boil Potatoes: Place peeled and quartered potatoes in a saucepan and cover with cold, salted water. Bring to a boil, then reduce and simmer until fork-tender (15–20 minutes).
  5. Drain and Dry Potatoes: Thoroughly drain the potatoes and return them to the hot pan. Place the pan back on the hob for 1 minute to 'steam dry' the potatoes. This is vital to prevent watery mash.
  6. Finish the Mash: Pass the hot potatoes through a potato ricer (preferred) or mash thoroughly. Gently heat the milk/cream and butter together. Add the warmed dairy mixture, mustard, salt, and pepper to the potatoes. Fold quickly until just combined and creamy. Do not overwork the mash.
  7. Cook Sausages (Bangers): Prick the sausages lightly. Cook the sausages over medium heat, turning regularly, for 15–20 minutes, until they are deeply browned, caramelized on all sides, and cooked through (internal temperature 71°C/160°F). Rest briefly.
  8. Plating: Spoon a generous mound of creamy mash onto each plate. Nestle two sausages beside or on top of the mash. Drench the dish with the rich onion gravy, ensuring plenty of caramelized onions are scooped out. Serve immediately.