Ingredients:

• 1 tablespoon olive oil
• 1 pound (450g) lean ground beef
• 1 1/2 cups (180g) diced yellow or red onions
• 2 to 3 cups (475ml to 710ml) chicken or beef stock (use more if you want a thinner soup)
• 1 (15-ounce) can diced tomatoes
• 1 (15-ounce) can black beans, drained and rinsed
• 1 (15-ounce) can kidney beans, drained and rinsed
• 1 (4-ounce) can chopped green chiles
• 1 1/4 cups (135g) corn kernels, fresh or frozen
• 2 1/2 teaspoons chili powder
• 1 teaspoon ground cumin
• 1 teaspoon paprika
• 1 teaspoon salt
• To serve:
• Tortilla chips, lightly crushed, optional
• Sour cream, optional
• Chopped cilantro, optional
• Finely diced or chopped red onion, optional
• Lime juice