Chicken Black-Bean Tacos

For the rub: In a small bowl, combine garlic powder, paprika, thyme, cayenne, and black pepper.

For the chicken: Lightly pound each chicken breast to an even 1/2" thickness. Rub a thick layer of the spice mixture onto both sides of each chicken breast.

In a large heavy skillet, heat 1 tablespoon of the oil over high heat until hot but not smoking. Add chicken and cook until blackened on both sides and cooked through, 2–3 minutes per side. Transfer chicken to a cutting board.

Reduce heat to medium and add remaining 1/2 tablespoon of oil and onion to the skillet. Cook, stirring to scrape up any brown bits clinging to the bottom of the skillet, until onion is softened, 1–2 minutes. Add beans and cook until heated through, 2–3 minutes. Remove from the heat and stir in tomato and minced cilantro.

Warm tortillas according to package directions. Cut chicken on the diagonal into 1/2"-thick slices. Place tortillas on 4 plates. Divide chicken and beans among tortillas. Fold tortillas into cones and top with cilantro leaves.