Put 2 tbsp of the oil in a large, deep saucepan over a medium-high heat. Add the beef, all the spices and oregano. Cook, breaking up with a wooden spoon, for 5-7 mins until browned. Remove to a bowl and set aside. Reduce the heat to medium, pour in the remaining oil and stir in the onion. Cook for 6-8 mins until softening, then mix in the garlic, coriander stems and tomato purée. Cook for 3-4 mins until the garlic is fragrant and the tomato purée has darkened.

Return the beef to the pan along with the jalapeños, beef stock, tomatoes, beans, sweetcorn and polenta. Stir well and bring to a gentle simmer. Cook for 25-30 mins until reduced slightly. Season and serve with the coriander leaves and other toppings.