Spray a large pot lightly with oil and heat it over high heat. When hot, add the cumin and mustard seed; cook for 1 minute or until seeds begin to pop. Immediately add the onion and saut? for 3 minutes. Add the lentils, water, vadouvan, garlic, and coriander. Bring to a boil, reduce heat, and cook, covered, until lentils are completely soft, about 20 minutes. Add the tomatoes and salt to taste. Simmer, uncovered, adding more water if necessary, for about 20 minutes. Just before serving, stir in the spinach and cook just until wilted but still bright green. Makes 4-6 servings. At 4 large servings, each provides 306 Calories (kcal); 1g Total Fat; (3% calories from fat); 23g Protein; 54g Carbohydrate; 0mg Cholesterol; 372mg Sodium; 25f Fiber. Weight Watchers Core / 5 Points.