Using a large skillet over low-medium heat, drizzle a tablespoon or two of oil and cook onion and bell pepper until softened. Add garlic and cook until fragrant.

Add ground beef to the skillet and increase heat to medium-high. Let meat brown, stirring and breaking into pieces.

Once the meat is cooked, add the ingredients and stir to combine. Bring to a simmer and lower the heat, stirring occasionally, until thick and saucy.

Toast hamburger buns and serve warm sloppy joe meat mixture on top. Serve warm and enjoy immediately!