Heat a fry pan over medium heat. Cooking beef, chopping as little as possible, until browned also about the size of a pea, 5 to 7 mn. Adding Worcestershire sauce, salt also pepper. Gently stirring, then remove the mix from the pan.
Melting butter in the skillet. Adding onions and pepper. cooking and stirring to golden brown, 5 to 7 minutes. Returning beef mixture to the skillet and stirring to combine. Letting filling cool while preparing rolls.
Enjoy !