Start by cooking the turkey or bison in a 4-quart dutch oven or similar sized deep skillet or saucepan, something that will eventually hold your pot of chili.
Heat pan, drizzle in half of the oil and add the meat. Break up into lumps and allow to brown before turning to develop more flavor. When browned completely, transfer to a plate and set aside.
Heat remaining oil, add onion and green pepper, and cook until softened, about 5 minutes.
Add tomato paste and stir to cook a minute then add the garlic and green chiles and cook a minute. Add the water, beans, tomatoes, chile powder, cocoa powder, chocolate, oregano, and salt. Return the browned meat to the pot and simmer gently “awhile” (15 minutes if you’re trying to get dinner on the table or ideally longer, like 30–45 minutes.)
While simmering mash at the tomatoes or cut them with kitchen shears to get them into smaller pieces. Serve with grated cheddar cheese, sour cream and cornbread, tortillas, or sweet potatoes (fries or baked whole).