01 -
Preheat your Blackstone grill to medium-high heat, around 400°F. Spread the vegetable oil evenly across the cooking surface to create a non-stick base.
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 crispy on the edges.
03 -
Push the cooked steak and onion mixture to one side of the grill and reduce the temperature to medium heat for assembling and cooking the quesadillas.
04 -
Place the tortillas on the cleared grill area. Layer each with mozzarella and Monterey Jack cheeses, then add the steak and onion mixture. Top with more cheese.
05 -
Carefully fold each tortilla in half to create a half-moon shape. Cook for 1-2 minutes until the bottom is golden brown.
06 -
Flip each quesadilla using a spatula. Cook for another 1-2 minutes until the other side is golden brown.
07 -
Remove the quesadillas from the grill to a cutting board. Slice into wedges and serve immediately.