Pour 2 Tbsp extra virgin olive oil onto a hot pan over medium heat.
Sear steak for about 2 minutes per side and remove from pan.
Add 1 Tbsp extra virgin olive oil to the pan, and add the peppers and onions.
Cook for 5-10 minutes or until soft.
Add garlic and cook for another 1-2 minutes.
Transfer steak and vegetables to the slow cooker.
Add all other ingredients and cook for 8 hours on low.
Shred steak and serve.