BBC Food - Recipes - Catalan potato and bean stew

Ingredients

• 6 garlic cloves, peeled
• 250ml/9fl oz extra virgin olive oil
• 1 tsp salt
• 1 tsp sherry vinegar
• 2 tbsp olive oil
• 50g/2oz breadcrumbs
• 3 red onions , peeled and finely chopped
• 4 garlic cloves, chopped
• 750g/1lb 10oz potatoes, unpeeled, cut into large cubes
• 250ml/9fl oz vegetable stock
• 4 tomatoes, peeled, chopped
• 1 can cannellini beans , drained
• 1 handful fresh mint leaves
• 1 tbsp fresh parsley , chopped
• 75g/2½oz butter
• ½ lemon , juice only