Wash and slice the zucchini lengthwise or into thick rounds.

Brush both sides with olive oil.

Season with garlic powder, Italian seasoning, paprika, salt, and black pepper.

Grill over medium-high heat until tender and nicely charred on both sides.

Sprinkle mozzarella and Parmesan over the zucchini.

Cover briefly or place under a broiler until the cheese is melted, bubbly, and golden.

Garnish with fresh parsley and serve warm.