In an enamelled cast iron dutch oven add oil and heat to medium / high heat.
Add the ground beef, crumbling it apart, with a wooden spoon.
Add the chopped onion, garlic and chopped green pepper, to the ground beef while browning. Stir continuously to prevent burning.
Once the meat is browned reduce the heat to low / medium before adding the rest of the ingredients.
Add the chili powder and stir until the meat mixture is well coated.
Stir in drained mushrooms and the rinsed kidney beans.
Add the Walden Farms syrup and stir into the mixture.
Add the diced tomatoes, salt and pepper and mix well.
Bring the chili mixture to a full boil and allow to boil vigorously for 5 minutes, while stirring to prevent burning or sticking to the bottom of the pan.
Reduce the heat and simmer for 15 minutes.
Remove from heat and allow the chili to cool slightly. Keep the lid on the pan while cooling.
Before serving, bring the chili mixture to a full boil again for 5 minutes, stirring continuously.
Reduce the heat and simmer again for 15 minutes. Stir periodically to prevent sticking.
Allow to cool with the lid on the pan.
Repeat the boiling process 2 more times if time allows.
When not stirring, keep the lid on the pan.
Serve hot,
NOTE . If the Chili needs more liquid, add water or beef broth.