Lightly oil a glass container or dish.
In a bowl, whisk chickpea flour, salt, and turmeric with 1½ cups cold water until completely smooth (no lumps).
Bring the remaining 1½ cups water to a boil in a saucepan. Slowly whisk in the chickpea slurry.Note on firmness: Standard firmness is 1 cup flour to 3 cups of water. For extra firm (best for frying), use 2½ cups of water. For softer, custard-like tofu (best eaten fresh in salads), use 3½–4 cups of water. Reduce heat to medium and whisk constantly for 6–10 minutes, until the mixture is thick, glossy, and pulling away from the sides of the pan.
Immediately pour into your prepared dish and smooth the top with a spatula.
Allow to cool at room temperature for 1 hour, then transfer to the fridge to set fully for 4 hours or overnight.
Remove from the dish by placing a chopping board over the dish and flipping it out. Then slice or cube to whatever shapes you like.
To make popcorn nuggets, cut ⅓ of the block in cubes, then toss cubes with ½ tsp each of garlic powder, onion powder & smoked paprika powder, plus 1 Tbsp of nutritional yeast. Spray with olive oil, then air fry at 180c/350f for 15 mins, shaking every 5 mins (or oven bake 15–20 mins).