01 -
Preheat the Blackstone grill over medium-high heat (approximately 400°F) and spread vegetable oil on the surface.
02 -
Place the diced steak and onions on the grill in an even layer. Season with onion powder, salt, and pepper. Sauté for 4-8 minutes per side until the steak is browned and cooked through.
03 -
Push the steak and onions to one side of the grill. Reduce the Blackstone temperature to medium.
04 -
Place tortillas on the grill. Add a small amount of both cheeses on each tortilla, layer the steak and onions on top, then add more cheese. Fold the tortillas in half to form a half-moon shape.
05 -
Cook one side of each tortilla until golden brown (1-2 minutes). Flip and cook until the other side is golden brown (1-2 minutes). Monitor closely to prevent burning.
06 -
Transfer the quesadillas to a cutting board, slice them into portions, and serve immediately.