Mountain meatballs

Name: Mountain meatballs
Ingredients: olive oil; 2 red onions, peeled and finely diced; 1.2 kg good-quality minced meat (beef, buffalo or a mixture); 1 heaped teaspoon Dijon mustard; 1 teaspoon dried oregano; a pinch of cumin seeds, bashed up in a pestle and mortar; 1 teaspoon coriander seeds, bashed up in a pestle and mortar; 2 handfuls of breadcrumbs; 2 large free-range eggs; 100g freshly grated Cheddar cheese; CHILLI SAUCE; 1 large red onion, peeled and finely diced; 2 red or yellow peppers, deseeded and roughly chopped; 10 cloves of garlic, peeled and finely sliced; 1 to 2 fresh red chillies, deseeded and finely chopped, to taste; ½ teaspoon smoked paprika; 6 tablespoons Worcestershire sauce; 6 heaped tablespoons tomato ketchup; 6 tablespoons cider vinegar; 6 tablespoons molasses or dark brown sugar; 2 tablespoons Dijon mustard; 400ml hot coffee; 3 plum tomatoes, quartered; ½ a bunch of fresh flat-leaf parsley (15g)