Place the meat in a large iron skillet and smoke it at 225 degrees until browned and cooked.
While the meat is cooking in the smoker, dice the onion and the pepper and mince the garlic.
Place the onion, peppers and garlic with 1 TBS of Jeff's Texas style rub and 2 TBS of butter in a large skillet over medium heat. Saute until they are soft and blackened.
Once the meat is done cooking, add the vegetables, 1 cup of barbecue sauce, 1/2 cup of condensed tomato soup, 1 TBS of yellow mustard and spices to the skillet with the meat and simmer over low heat.
Simmer until the mixture is no longer soupy and has the right consistency. If you need to make it more saucy, you can add more of the tomato soup or a small amount of water.
Butter the buns and toast them on a griddle or in an iron skillet until they are browned and crispy on the bread side.
Put about 1/3 cup of the smoked sloppy joes on the bottom bun and cap it off with the top bun.