Beef Birria Grilled Cheese

Ingredients

• 1.5kg beef brisket
• 6 mixed dried chillies (ancho, guajillo, chipotle etc.)
• 1 tbsp tomato paste
• 1 onion
• 4 large tomatoes
• 4 garlic cloves
• 2L beef stock
• 1 tsp dries oregano
• 1 cinnamon stick
• 4 bay leaves
• 1 tsp black pepper, coriander seeds, cumin seeds
• thick sliced white bread
• grated mozzarella
• butter
• 1/2 white onion, diced
• coriander