Heat a large skillet over medium heat and add oil. Cook the ground meat until browned, about 5–7 minutes, then drain excess fat.

In the same skillet, sauté diced onion, bell pepper, and minced garlic for 3–5 minutes until softened.

Stir in ketchup, tomato paste, Worcestershire sauce, and mustard. Simmer over low heat for 5–7 minutes until thickened.

Add red food coloring to the filling and stir well for a gruesome appearance.

Prepare the buns by scoring the tops or piping designs with thick pink mayo or cream cheese.

Assemble the sandwiches by scooping the meat mixture onto the bottom bun and placing the top bun to mimic spilling brains.

Serve immediately and enjoy with spooky sides!