01 - Heat olive oil in a large skillet over medium heat. Add diced red onion and red bell pepper; sauté for 3 to 4 minutes until softened.
02 - Add minced garlic, ground cumin, smoked paprika, chili powder, salt, and black pepper to the skillet. Cook for 1 minute until aromatic.
03 - Incorporate the drained black beans and cook for 2 to 3 minutes until heated. Lightly mash half the beans in the skillet for a creamy consistency. Stir in chopped cilantro, if desired, then remove from heat.
04 - Arrange 4 tortillas on a clean work surface. Evenly distribute the black bean mixture onto each, leaving a 1/2-inch border, and top each with 1/2 cup shredded cheese.
05 - Place remaining tortillas atop the filled ones to form 4 quesadillas.
06 - Optional: Employ cookie cutters or a sharp knife to create festive shapes, such as ghosts or pumpkins, on the top tortillas before assembling.
07 - Melt butter or heat oil in a large nonstick skillet over medium. Cook each quesadilla for 2 to 3 minutes per side until golden and the cheese is fully melted.
08 - Slice each quesadilla into wedges. Adorn with sliced olives for eyes or creative Halloween presentation.
09 - Present quesadillas warm, accompanied by sour cream, salsa, and optional guacamole.