I start by halving the tomatillos through the middle, not from the top, and laying them cut-side up on a baking tray with the halved jalapeños. A light drizzle of olive oil goes over everything before it all goes under a hot grill for about 10 minutes. This step brings out a smoky sweetness that you just can't get any other way.
While the tray is under the grill, I finely chop the onion, garlic, remaining green chillies, and bell pepper. I also chop the coriander separately since it goes in at two different stages. Having everything prepped before you start cooking makes the rest of the process move quickly.
In a large pot, I heat the oil over medium-high heat and brown the chicken pieces for about 2 minutes per side, seasoning lightly with salt and pepper as they cook. I take the chicken out and set it aside on a plate while I build the base of the chili.
In the same pot, I sauté the onions for a minute before adding garlic, bell pepper, chillies, cumin, bay leaf, and oregano. Once that's fragrant, I stir in the chopped coriander along with the roasted tomatillos and jalapeños, juices and all, mixing everything together well.
The chicken goes back into the pot, followed by the chicken stock. I bring it to a boil, then reduce the heat to low, cover, and let it simmer for about an hour, stirring occasionally, until the chicken is falling-apart tender.
Once the chicken is cooked, I pull it out, shred it off the bone, and return the meat to the pot. I let everything cook uncovered on low heat for another 10 minutes so the liquid reduces and thickens slightly.
Right at the end, I stir in the lime juice and green Tabasco (or vinegar if that's what I have on hand), taste, and adjust the salt if needed. A sprinkle of fresh coriander and a drizzle of soured cream on top, and it's ready to go.