Making Homemade Taco Bell Quesadilla is quite simple if you follow these easy steps:

1. Prepare the Filling: In a bowl, combine the diced chicken (or your chosen protein), taco seasoning, sliced bell peppers, and onions. Mix thoroughly to coat the ingredients with seasoning.
2. Warm the Tortillas: Heat a skillet over medium heat. Lightly warm each tortilla for about 30 seconds on each side to make them more pliable.
3. Heat the Skillet: Add 1 tablespoon of olive oil or butter to the skillet. Allow it to melt and coat the pan.
4. Assemble the Quesadilla: Place one tortilla in the skillet. Sprinkle a generous amount of cheese on one half of the tortilla, followed by a scoop of the filling mixture. Fold the tortilla in half over the filling.
5. Cook Until Golden: Cook for 3-4 minutes, or until the bottom is golden brown. Carefully flip the quesadilla using a spatula.
6. Finish Cooking: Cook the other side for an additional 3-4 minutes until it is also golden and the cheese is fully melted.
7. Remove and Slice: Carefully transfer the quesadilla to a cutting board and let it rest for a minute before cutting it into wedges.
8. Repeat: Repeat the process with the remaining tortillas, adding more oil or butter to the skillet as necessary.
9. Serve Warm: Place the cut quesadilla wedges on a platter, ready to be served!