Heat butter in a pan. Then saute the onion for 5 minutes.
After 5 minutes, add the ground beef and mix until it turned brown.
Season the ground beef with salt, ground black pepper, oregano powder, taco powder, chili powder, tomato sauce, and cooked corn grains. Cook for another 5 minutes then set aside.
In a large bowl, mix the lettuce with tomatoes, sugar, cheese, salad dressing, and ground beef. Mix well.
Serve with tortillas, and enjoy!