Preheat a skillet over medium heat, and drizzle a little olive oil in there. When it's nice and hot, lightly toast the street taco tortillas on both sides.
Preheat your oven to 450° with a large cast iron skillet inside.
Next, drizzle a little more olive oil in the hot skillet and toss your shredded chicken in there. Cook this until it's a nice crispy brown, but not dried out.
Pull the hot skillet out and assemble your tacos in it starting with the chicken first, then your choice of shredded cheeses, pico de gallo, or whatever your flavor is.
Pop that skillet in your preheated oven for about 2 minutes. You want everything sizzling and the cheese melted nicely.