01 -
Get your oven ready by warming it up to 190°C.
02 -
Slice the baguette lengthwise, removing some of the inside to leave a thick edge. Spread mayonnaise evenly over the inside, and arrange the bread halves on an oven tray.
03 -
Heat olive oil in a big nonstick pan over medium-high heat. Stir in the chopped onion, diced bell pepper, and mushrooms. Cook them until softened, about 2 minutes.
04 -
Add the minced beef to the pan. Break it apart while cooking, and continue stirring until no pink meat remains, which should take about 3 minutes. Drain off any excess fat left behind.
05 -
Mix Worcestershire sauce, salt, and pepper into the beef mixture. In a small dish, blend the cornstarch with the beef broth. Pour this mixture into the pan and stir occasionally while letting it gently cook for 2–3 minutes, until slightly thicker.
06 -
Spoon the beef mixture evenly onto both bread halves, spreading it out smoothly.
07 -
Scatter the shredded cheese generously over the filled halves.
08 -
Bake in the oven for roughly 15 minutes until the cheese melts and gets a lovely golden hue. Or, if you'd rather, broil it briefly for a crispier top.
09 -
Cut the bread into appetizer-size portions or larger pieces for a meal. For those who like heat, sprinkle on some red pepper flakes. Time to dig in!