Beef, Courgette and Red Onion Gratin - Filippo Berio

Ingredients

• 3 tbsp Filippo Berio Olive Oil
• 500g beef chunks
• 3 tbsp Filippo Berio red wine vinegar
• 2 cloves garlic, finely chopped
• 300ml beef or chicken stock
• 300ml passata
• 3 sprigs fresh thyme
• 1 tsp dried oregano
• 3 courgettes, sliced into half moons
• 3 red onions, peeled and cut into cm thin wedges
• 4 tbsp fresh breadcrumbs
• 2 tbsp Parmesan cheese
• resh greens and new potatoes to serve