Wash the broccoli and cut it into evenly sized florets for uniform cooking.
In a bowl, toss the broccoli florets with olive oil, garlic powder, salt, and black pepper. Ensure all the florets are evenly coated with the seasoning.
Heat your Blackstone griddle to medium-high heat.
Place the seasoned broccoli florets on the griddle in a single layer.
Grill the broccoli for about 4-5 minutes on one side until you see a nice char developing.
Flip the florets over and grill for another 3-4 minutes on the other side. The goal is to achieve tender broccoli with some crispy edges.
Once the broccoli is cooked to your liking, squeeze fresh lemon juice over the florets. This adds a bright and zesty flavor.
If desired, sprinkle red pepper flakes for a bit of heat and/or grated Parmesan cheese for a savory touch.
Serve the broccoli immediately as a delicious side dish.