Indian Ratatouille

Name: Indian Ratatouille
Ingredients: 1/4 cup vegetable oil; 1 tablespoon mustard seeds; 1 8-ounce red onion, cut into 1/2-inch pieces; 1 large jalapeño chili, chopped; 1 tablespoon chopped peeled fresh ginger; 2 3/4-pound eggplants, quartered lengthwise, cut crosswise into 1/3-inch-thick slices; 2 medium zucchini, halved lengthwise, cut crosswise into 1/3-inch-thick slices; 3/4 pound plum tomatoes, chopped; 3 large garlic cloves, chopped; 2 tablespoons chopped fresh mint; 1 tablespoon fresh lemon juice