Bangers and Mash Casserole

Preheat the oven to 375°F (190°C). Lightly grease a medium baking dish.
In a skillet over medium heat, cook the sausages until browned and fully cooked, turning occasionally. Once done, slice them into thick rounds and set aside.
In the same skillet, melt butter and sauté the sliced onions over medium heat for 8–10 minutes, or until soft and deeply golden.
Sprinkle flour over the onions and stir well to coat. Cook for 1 minute to form a roux.
Gradually whisk in the beef broth and Worcestershire sauce. Bring to a simmer and cook for 5–7 minutes until the gravy thickens. Stir in thyme (if using), and season to taste with salt and black pepper.
Spread the mashed potatoes evenly in the prepared baking dish.
Arrange the sausage slices evenly over the mashed potatoes.
Pour the onion gravy over the sausage and potatoes. If using, sprinkle cheddar cheese over the top.
Bake uncovered for 20 minutes until bubbling and lightly golden on top.
Let the casserole cool for a few minutes before serving.

Veggie Twist: Substitute pork sausages with plant-based or vegetarian sausages for a meatless version.
Mustard Gravy: Add 1–2 teaspoons of whole grain or Dijon mustard to the gravy for a tangy depth.
Mash Upgrade: Stir in a little cream cheese, horseradish, or roasted garlic to elevate your mashed potatoes.
Cheese Lovers: Mix shredded cheese directly into the mashed potatoes for double the melty goodness.
Herb Boost: Add fresh parsley or chives to the mashed potatoes or sprinkle over the finished casserole.

Use Good Sausages: High-quality pork sausages bring the most flavor to the dish.
Mashed Potato Texture: Smooth, buttery mash helps the casserole bake evenly and stay creamy.
Gravy Consistency: Don’t over-thicken the gravy—it should be pourable but rich.
Make Ahead: Assemble the casserole in advance and bake when ready to serve.
Reheating: Warm leftovers in the oven at 350°F (175°C) covered with foil, or microwave individual portions.

This Bangers and Mash Casserole offers a deliciously modern way to enjoy a beloved classic—with less fuss and more comfort in every bite.