Brown the Beef: Heat the olive oil in a large, heavy-bottomed pot over high heat until it shimmers. Add the beef mince in a single layer and let it cook undisturbed for 4 minutes — you'll hear a satisfying sizzle and see a deep, dark crust forming on the bottom. Break the meat apart with a wooden spoon and continue cooking until no pink remains, about 6 minutes total.

Sweat the Aromatics: Reduce the heat to medium. Add the diced onions and stir constantly for 5 minutes until they turn translucent and glossy, with a sweet, fragrant smell filling your kitchen. Add the garlic and tomato paste, stirring for 1 minute more until the paste darkens to a rusty red colour.

Toast the Spices: Sprinkle the cumin, smoked paprika, oregano, cayenne, salt, and black pepper over the meat mixture. Stir vigorously for 30 seconds — you'll notice the spices release a heady, earthy aroma that signals their full flavour is awakening.

Deglaze and Build the Base: Pour in the tinned tomatoes and beef stock, scraping the bottom of the pot with your spoon to lift all those browned bits. The liquid will bubble up immediately, turning a rich brick-red colour. Bring the mixture to a boil, then reduce the heat to low.

Simmer Low and Slow: Cover the pot and let the chili simmer gently for 45 minutes. Stir occasionally, and you'll notice the liquid reducing and thickening, with the colour deepening to a dark mahogany. The aroma will become more concentrated and complex.

Add the Beans and Sweetness: After 45 minutes, stir in all three types of beans, the brown sugar, and the apple cider vinegar. The vinegar's sharp scent will mellow as it cooks. Simmer uncovered for another 30 minutes, stirring every 10 minutes, until the chili has a velvety, spoon-coating consistency and the beans are tender but not mushy.

Rest and Adjust: Remove the pot from the heat and let the chili rest for 10 minutes. This allows the flavours to settle. Taste and adjust salt or cayenne as needed. You should see a glossy sheen on the surface — a sign of a well-emulsified, rich chili.