In the morning, add the meat, vegetables and some spices to your slow cooker and by dinner you will have the most tender and flavorful dinner waiting for you!
Mix together all spices in a small bowl. Rub the spices all over your flank steak—be generous here! Then, place your steak at the bottom of your crock pot.
Cover the steak with the chopped onions, bell peppers and jalapeno pepper. Turn heat on LOW and cook for 8 hours.
After 8 hours, remove meat from crock pot and shred with a fork. It should be incredibly easy to shred. You can either stick the shredded meat back in the pot for another hour or serve as is.
To serve, heat your corn tortillas in a skillet on the stove. Spoon some carnitas on a tortilla then top with salsa, avocado, cilantro and a squeeze of lime.