Preheat oven to 400°; place 4 tortillas on baking sheet, then brush lightly with oil + pinch of salt; bake 7-9 min until starting to crisp

Meanwhile, heat 1 tsp oil in skillet over high; add the beef to pan, break into large chunks + sear undisturbed 2 min; flip meat over, season generously with salt/pep + seasoning pack, then break into small pieces; cook 2-3 min until fully cooked + no pinkness remains

Wash + slice tomatoes in half

Divide 8 tbsp guac, beef + tomatoes to tortillas