Gather all your ingredients and slice any vegetables or proteins you will use.

Place a skillet over medium heat and add a drizzle of olive oil.

On half of each tortilla, sprinkle a generous amount of cheese, followed by your protein and any veggies. Fold the tortilla over to create a half-moon shape.

Carefully place the quesadilla in the hot skillet. Cook for about 3 minutes until the bottom is golden brown and the cheese starts to melt.

Use a spatula to flip the quesadilla gently. Cook for another 3 minutes on the other side until it's crispy and the cheese is fully melted.

Transfer the cooked quesadilla to a cutting board. Let it cool for a minute, then slice it into wedges for easy serving.

Garnish with fresh cilantro if desired. Serve with sour cream and guacamole for dipping.