Make the Moong Batter: Blend drained yellow moong dal, ginger, and a splash of water into a smooth, thick batter. Transfer to a bowl.
Combine Mix-ins: Stir in fine semolina, Greek yogurt (or thick yogurt), salt, and turmeric powder until smooth and well combined.
Prep the Steamer: Grease a 6-inch round cake tin with oil. Set up a wide pan or steamer with 1–2 inches of boiling water and a trivet.
Activate & Pour: Add fruit salt to the batter, squeeze lemon juice directly over it to activate, and stir rapidly until pale and frothy. Immediately pour into the greased tin.
Dust & Steam: Dust the top evenly with Kashmiri red chili powder. Place the tin on the rack, cover tightly with a lid, and steam on medium-high for 12–15 minutes until a knife inserted comes out clean.
Temper & Serve: Remove from the steamer. Sprinkle freshly grated coconut over the warm dhokla. Heat oil or ghee in a small pan, crackle mustard seeds, green chilies, and curry leaves, then pour the sizzling tadka over top.
Slice & Serve: Slice into neat squares and serve warm with green chutney!