Barbecue Chicken Quesadillas

2 Tablespoons melted butter
6 flour tortillas
shredded cheddar cheese (or whatever cheese you like)
diced red onion (can use green onion in it's place)
leftover slow cooker barbecue chicken or your own bbq chicken

Brush one side of the tortilla with melted butter. Place butter side down in frying pan. Sprinkle the entire tortilla with a light layer of cheddar cheese and sprinkle on some red onion. Cook over medium heat until under side is browned and crisp and cheese is melted. Top half the tortilla with warmed bbq chicken and fold tortilla in half, then cut in half so you have two triangles.