Tricolor Vegetable Latkes

Name: Tricolor Vegetable Latkes
Ingredients: 1 zucchini, grated; 1 yellow squash, grated; 1 1⁄2 teaspoons kosher salt, divided; 1 teaspoon canola oil; 1 small leek, sliced; 1 large baking potato, peeled; 1⁄2 sweet potato, peeled; 1⁄4 teaspoon white pepper; 1⁄2 small red onion, minced; 3 tablespoons all-purpose flour; 2 tablespoons matzo meal; 1 large egg, beaten; 1⁄2 teaspoon baking soda; 1⁄2 teaspoon garlic salt; 1⁄4 teaspoon hot sauce; canola oil; 4 ounces thinly sliced cold smoked salmon (optional); sour cream; caviar (optional)