How to make tadka without a single drop of oil

Dietician Kanikka Malhotra suggests a three-step oil-free tadka. Dry-toast mustard seeds, cumin, fenugreek and dried chilli in a steel or cast-iron pan, then set them aside. Cook garlic, ginger, green chilli and curry leaves in two to three tablespoons of water. Finally, add powdered spices as a water slurry, dissolve hing in warm water, combine everything and pour over dal.