Add the olive oil, onion, pepper, garlic, brown sugar and apple cider vinegar in a shallow pan over a medium heat
Sauté for 5 minutes
Add in the beef steak strips and saute for 4 minutes
Set aside

Cut the roll in half lengthways and place outside downwards on a baking sheet
Top with the steak mix and dairy free cheese
Heat under a low grill until the cheese has melted
Serve with salad and fries