Preheat your oven to 400°F.
In a pan, heat olive oil over medium heat. Add the diced chicken and season with the spices. Sauté until the chicken is nicely browned. Set aside.
Line a baking sheet with parchment paper. Place the tortillas on the sheet and brush both sides with olive oil. Add the sautéed chicken to one half of each tortilla.
Top the chicken with a generous amount of grated cheese. Fold the tortillas in half and press firmly to seal. Sprinkle a little extra cheese on top.
Bake in the preheated oven for about 15 minutes, or until golden and the cheese is melted and bubbly.
While the tacos bake, make the chipotle crema: In a blender or food processor, combine sour cream or Greek yogurt, a chipotle pepper with a bit of adobo sauce, the juice of 1/2 lime, and a pinch of salt. Blend until smooth.
Once the tacos are crispy and golden, remove from the oven. Dress with pickled red onions, cilantro, lime wedges, and a drizzle of the chipotle crema.