Zucchini Appetizer Squares

Preheat the oven to 350 degrees F (175 degrees C). Grease a 9x13-inch baking dish.

Mix zucchini, baking mix, eggs, oil, onion, Parmesan cheese, parsley, garlic, salt, and pepper in a large bowl; spread in the prepared baking dish. Garnish with paprika in a grid design, if desired.

Bake in the preheated oven until golden brown and a toothpick inserted into the center comes out clean, about 25 minutes. Let cool before cutting into 2-inch squares.