Sauté the Onions: In a pan, heat 1 tablespoon of olive oil over medium heat. Add the sliced red onion and cook until translucent and soft. Season with fresh ground pepper. Set aside.
Assemble the Quesadilla: Take a tortilla and sprinkle half of it with grated colby jack cheese. Add crumbled goat cheese on top, followed by a layer of sautéed onions.
Cook the Quesadilla: Heat a medium pan with olive oil over medium heat. Fold the tortilla in half and cook until browned on one side. Flip and cook the other side until golden and crispy.
Serve: Once cooked, transfer the quesadilla to a plate, sprinkle with extra colby jack cheese, and cut into quarters. Top with sour cream and garnish with salsa and additional onions for a flavorful finish.
Enjoy: Serve your quesadilla warm and enjoy the perfect balance of creamy, cheesy, and savory goodness.