In a large soup pot, heat the olive oil over medium heat. Add diced onions and bell peppers, sautéing until they become tender and aromatic.
Add the ground beef to the pot and cook until browned. Break the meat into crumbles as it cooks.
Stir in the taco seasoning, ensuring that the meat is evenly coated with the spices.
Pour in the beef broth and diced tomatoes, and bring the mixture to a simmer. Let it cook for 10-15 minutes to allow the flavors to meld.
Add diced jalapeños for extra spice, if desired. Remember to adjust the amount according to your heat preference.
Season with salt and pepper to taste.
To serve, ladle the keto taco soup into bowls and top each serving with shredded cheddar cheese, a dollop of sour cream, and chopped fresh cilantro.
Garnish with avocado slices and a squeeze of lime for a zesty and refreshing finish.
Enjoy your keto taco soup alongside a low-carb tortilla or on its own for a satisfying and wholesome meal that's perfect for any day of the week!