Begin to brown the ground beef in a large skillet. Once cooked through, drain any excess grease.
Add the dry seasonings to the skillet. Continue to simmer for another 5 minutes. Remove from heat and set aside for now.
Spray 1 cooking sheet with nonstick cooking spray.
Take a tortilla and spread the seasoned beef on one side. Top with chopped onion. Sprinkle cheese on the other side, then fold the tortilla over to create a taco.
Place the tacos on the baking sheet. Spray the tops with additional cooking spray.
Place another cooking sheet on top of the tacos, to keep them flat.
Bake at 400 degrees F. for 15-17 minutes, or until the tortillas are golden brown.
Remove and let cool slightly before serving.
ENJOY!