These fajitas cook very quickly with most of the time spent in preparation... slicing the veggies and meat.
I have found that when it comes to slicing meat into thin slices it’s much easier to do when I’ve put them in the freezer for 30 to 45 minutes. When that’s ready heat an 8 quart Dutch oven or large wok to high heat. Once the pan is heated, pour in 2 tablespoons vegetable oil. Next add all the peppers and onions, 1 tbsp salt and garlic. Start stirring and don’t stop for 3 minutes. Remove the mixture to a large bowl and set aside.