Combine the minced garlic, 2 tbsp olive oil, 2 tbsp adobo sauce, chili powder, cumin, oregano, salt, and black pepper in a large bowl.
Add the pounded chicken breasts to the bowl or a resealable bag and coat thoroughly with the marinade. Cover or seal and refrigerate for at least 30 minutes and up to 2 days.
Heat about 1 tablespoon olive oil in a large skillet over medium-high heat until shimmering.
Cook the marinated chicken in the hot pan, turning occasionally, until cooked through and no longer pink in the center, about 6–7 minutes per side for thicker pieces (adjust time for thin-pounded breasts).
Transfer the chicken to a cutting board and let rest 5–10 minutes.
Slice or chop the rested chicken and serve in burritos, salads, bowls, or on its own.