Sweat the Aromatics: Heat the olive oil in a large, heavy-bottomed pot over a medium heat. Add the diced onions and a pinch of salt. Cook for 5–7 minutes, stirring occasionally, until the onions become translucent and soft, and you can smell their sweet, mellow aroma. They should not be browning at this stage.

Build the Vegetable Base: Add the minced garlic, diced red peppers, carrots, and celery. Stir everything together. Cook for another 8–10 minutes. The carrots should begin to soften, and the peppers will release a slightly sweet, grassy scent. The vegetables will look glossy and have reduced in volume by about a third.

Toast the Spices: Push the vegetables to one side of the pot. Add the smoked paprika, ground cumin, dried oregano, and cayenne pepper (if using) directly to the hot oil. Stir the spices for 30–60 seconds until they become incredibly fragrant. You will smell a deep, smoky, warm aroma—this is the crucial moment for building flavour.

Deepen with Tomato Purée: Stir in the tomato purée and cook for 2 minutes, stirring constantly. The purée will darken from a bright red to a deep, rusty brick colour. This step removes the raw, acidic taste and adds a rich umami note.

Simmer the Chili: Pour in the chopped tomatoes and vegetable stock. Stir well, scraping the bottom of the pot to release any browned bits. Add the drained kidney beans and black beans. Bring the chili to a gentle boil—you will see lazy bubbles breaking the surface. Then, reduce the heat to low, cover, and let it simmer gently for 30 minutes. The kitchen will fill with a warm, smoky, and earthy fragrance.

Finish and Season: After 30 minutes, remove the lid. The chili should have thickened noticeably; the liquid will have reduced, and the beans will look tender and plump. Stir in the lime juice and half the chopped coriander. Taste and adjust the seasoning with salt and pepper. The final flavour should be savoury, slightly smoky, and bright from the lime.

Rest Before Serving: This is a non-negotiable step for presentation. Turn off the heat and let the chili rest, covered, for 10 minutes. This allows the flavours to meld and the texture to become even more luxurious. The chili will look glossy and deeply coloured.