Preheat oven to 400°.
Split pitas, and cut each half into 8 wedges. Arrange the wedges on a large baking sheet. Lightly coat the wedges with cooking spray, and sprinkle with salt. Bake at 400° for 7 minutes or until crisp.
Heat oil in a large saucepan over medium-high heat. Add cumin seeds and mustard seeds to pan; sauté 1 minute or until mustard seeds begin to pop. Add onion, ginger, garlic, and jalapeño to pan; sauté 3 minutes or until onion is tender. Stir in curry and turmeric; cook 30 seconds. Stir in tomatoes. Cover, reduce heat, and simmer 15 minutes. Uncover and cook 5 minutes or until slightly thickened. Stir in cilantro, raisins, and sugar. Cool to room temperature. Serve with chips.