How to Make It
Preheat oven to 375°F. Combine zucchini and salt in a large bowl and toss to coat; set aside until salt draws out a decent amount of liquid from zucchini, about 15 minutes. Pour off liquid and transfer zucchini to a few layers of paper towel or a clean dish towel. Roll up zucchini and gently press to absorb as much liquid as possible
Combine mayonnaise, cheese, garlic, Worcestershire, hot sauce, and 4 of the scallions and stir to combine. Fold in zucchini. Arrange bread in a single layer on a rimmed baking sheet. Spread zucchini mixture thickly and evenly over bread.
Bake until golden and bubbly, 30 to 35 minutes. Top with remaining scallions and a few grinds of pepper before cutting into wedges.