For the Chilli Beef:

• 1 tablespoon olive oil
• 1 small onion, finely chopped
• 2 cloves garlic, minced
• 1 pound (450g) ground beef
• 2 tablespoons tomato paste
• 1 tablespoon chili powder
• 1 teaspoon ground cumin
• 1/2 teaspoon smoked paprika
• 1/2 teaspoon dried oregano
• 1/4 teaspoon cayenne pepper (optional)
• 1/2 teaspoon salt
• 1/4 teaspoon black pepper
• 1/2 cup beef broth or water

For Serving:

• 8 small taco shells or tortillas
• 1 cup shredded lettuce
• 1 cup shredded cheddar cheese
• 1/2 cup diced tomatoes
• 1/4 cup sour cream
• 1/4 cup chopped fresh cilantro
• 1 lime, cut into wedges