Turn the heat to medium high temp. and saute ground beef a couple of minutes, then add onion powder, taco seasoning, Add a pinch of salt and black pepper to taste.
Let it cool down for a minute or two until putting them in the hard corn shells or serve in the soft tortillas with any topping that you desire.
My go-to toppings: pico de gallo, Mexican cream or sour cream, lettuce and Mexican shredded cheese. Sometimes I would add some pickled jalapenos.
You may use already premixed taco seasoning instead of mixing it yourself.