1. Heat oil in a large pan over medium heat. The perfect temperature for this is around 180°C or 350°F.

2. Add diced onion to the pan and cook until softened. This should take about 5 minutes.

3. Next, add diced red bell pepper to the pan. Cook for 2-3 minutes until it's slightly tender.

4. Now it's time to add the ground beef. Use a spoon to break it up as it cooks. Continue until the beef is no longer pink, which should take 5-7 minutes.

5. Add crushed garlic, chili powder, paprika powder, salt, and black pepper to the pan. Give it a good stir to combine all the flavors.

6. Add crushed tomatoes and ground coriander to the pan, stirring well to combine. Bring the chili to a simmer and let it cook for 10-15 minutes, stirring occasionally.

7. While your chili is cooking, prepare the guacamole. Start by mashing 1 1/4 cups or 300ml of sour cream in a bowl. Add salt and pepper to taste.

8. To serve, place a generous portion of the chili in a bowl, followed by a dollop of guacamole on top. Finish with sliced red onion and some crunchy tortilla chips.