PREP BEEF: Pat beef dry with a paper towel. Cut the beef into four equal sizes. Set out a small bowl with 1/2 teaspoon each of salt & pepper. Season one side of the beef.
BROWN BEEF: Begin by heating 1 tbsp oil in a heavy-based skillet over high heat. Once the oil is hot, add the beef in a single layer. Allow it to sear and brown on every side, around 3-4 minutes per side. Rotate beef with tongs; you'll know that each side has been seared perfectly if the beef releases from the pan easily and can be rotated without resistance. Once seared, transfer the beef to a plate and set it aside for now. Turn off heat and let pan slightly cool.
VEGGIES: While beef is browning, prep the veggies by finely dicing the bell peppers and onion and mincing the garlic. Return pot to heat, over medium-high. If needed add another drizzle of oil to the pan. Add the onion and peppers. Sauté, stirring occasionally, until onion is becoming golden, about 3-5 minutes. Meanwhile, measure out seasonings. Add the garlic, tomato paste, and all of the seasonings to the pot. Season to taste, we add 1-1/4 tsp salt & 3/4 tsp pepper here. Sauté for another 2-3 minutes or until tomato paste begins to darken. Turn off heat and use a spatula to transfer all of this mixture to a slow cooker. (IF anything is sticking to the pot, deglaze it with some of the crushed tomatoes and then dump those into the slow cooker).
SLOW COOKER: To the slow cooker, add the crushed tomatoes, all of the (undrained) beans, and Worcestershire sauce. Stir well. Add the beef (along with any accumulated juices on the plate) to the slow cooker. Press beef to be submerged below other ingredients. Cover and cook on low for 8 hours (high heat not recommended.) Remove beef from slow cooker and shred with two forks, discarding the fat. Return beef to the slow cooker and gently stir through.
ENJOY: Taste chili and adjust seasonings as needed. Ladle into bowls. Serve with toppings of choice--we think sour cream and freshly grated sharp cheddar is a must! Other favorites: guacamole or diced avocado, fresh cilantro, fresh lime. Serve either with tortilla chips or cornbread for dunking! Enjoy!
STORAGE: Store leftovers in the fridge for 5 days (only gets more flavorful as it sits!) Or freeze some for later; it freezes beautifully (more details in the post)! OR check out the post for fun ways to re-purpose leftovers.