BBC Food - Recipes - Beef burger with thyme potato wedges

Ingredients

• 1 large potato , cut into wedges
• 2 garlic cloves, unpeeled
• 2 tbsp olive oil
• 1 sprig fresh thyme , leaves only
• salt and freshly ground black pepper
• ¼ onion , finely chopped
• 150g/5½oz minced beef
• pinch dried chilli flakes
• dash olive oil
• 2 slices ciabatta or 1 ciabatta roll, halved