Cook the ground beef in a skillet or large pan over medium-high heat.
Season with taco seasoning and break up the meat with your cooking spoon as you work. The meat should be cooked through, with no pink remaining. Then remove to a bowl.
Add a couple teaspoons of oil to a large pan over medium heat.
Then add the tortilla and sprinkle in the cheese and cooked meat. Place a lid over the top (if your pan has a lid) and cook for 2 minutes until the cheese has melted.
Then flip the tortilla over on itself, creating a half moon shape.
Remove to a plate and allow to cool for a couple minutes before cutting into segments. Serve warm.
Notes
While I prefer cooking quesadillas on the stove top when I'm making just one or two, if I want to make more at one time, baking in the oven is the way to go!Brush the baking sheet with a little oil where the tortillas will be placed. Then add the tortilla. On one half add the cheese and cooked meat (same method as above for cooking the meat). Then fold the tortilla over on itself, making the half moon shape. Brush the top with oil as well.Bake at 400°F for 5-6 minutes, then carefully flip the quesadilla to the other side. I use tongs for this. Bake for an additional 5-6 minutes (10-12 minutes total).