Steak sandwich with caramelised onions | Lurpak®

Ingredients

• Lurpak® Spreadable Slightly Salted
• 2 demi-baguettes (approx. 125g)
• 200 g lean steaks sirloin, bavette/flank
• 1 tbsp neutral vegetable oil
• 1 large sprig of rosemary
• 3 garlic cloves
• ½ green peppers, seeded and sliced into small chunks
• 1 small red onion, peeled and sliced
• 1 small white onion, peeled and sliced
• 50 g rocket leaves
• salt
• pepper, freshly ground