Zucchini Latkes with Red Pepper Jelly and Smoked Trout

Name: Zucchini Latkes with Red Pepper Jelly and Smoked Trout
Ingredients: 1 pound medium zucchini; 1 large baking potato (3/4 pound), peeled; 1 small onion (4 ounces), peeled; 1/2 cup matzo meal; 1 large egg, lightly beaten; 1 teaspoon fresh lemon juice; 1 1/2 teaspoons salt; 1/2 teaspoon freshly ground pepper; Vegetable oil, for frying; 1/2 cup sour cream; 1/2 cup red pepper jelly; 3 ounces skinless smoked trout fillet, coarsely chopped; 2 ounces golden trout roe (see Note); 3 scallions, green parts only, thinly sliced