Optional step: for a richer flavour, brown the beef and cook off the vegetables and spices as outlined in the next three steps. If you're short on time, skip straight to the slow cooker step and add all the ingredients there instead. Heat a large non-stick frying pan over a medium to high heat and lightly spray with cooking spray. Add the beef mince and cook for 5-6 minutes, breaking it up with a wooden spoon, until nicely browned.