Short Rib Beef Burger with Chimichurri Mayonnaise

Ingredients

• 200g prime rib or short rib mince
• 1 tbsp of salt
• 1 tbsp of ketchup
• 1 tbsp of ground pepper
• Two burger buns
• One salad tomato, sliced
• Handful of gherkins
• Slice of Monterey Jack cheese
• 1/2 tsp crushed chillis
• Pinch of dried oregano
• 2 tbsp paprika powder
• 100ml red wine vinegar
• 1 bulb of finely chopped garlic
• One onion, finely chopped
• 75g parsley, finely chopped
• 50ml lemon juice
• 200ml plain mayonnaise