Crock Pot Beef Carnitas Tacos

Ingredients: 2 lbs flank steak 1 yellow onion, chopped 1 green bell pepper, chopped 1 red bell pepper, chopped 1 jalapeno, seeded and chopped for spice rub— 2 tsp chili powder 1 tsp cumin 1/4 tsp onion powder

1/4 tsp garlic powder 1/4 tsp cayenne pepper 1 tsp salt 1/2 tsp black pepper for serving— corn tortillas avocado slices cilantro your favorite salsa limes