In a medium bowl, mix together chopped spinach, mayonnaise, yogurt, water chestnuts, soup mix, and curry paste. Stir well to combine. If you like more curry flavour add a little more paste tasting as you go. Best to make this a couple hours in advance to let the flavours get happy. Keep in fridge until ready to assemble.
Cut off top of bread. Pull out bread in the bowl to make it slightly hollow and into a bowl shape. Fill with spinach mixture. Tear any extra bread into chunks for dipping.
Cut baguette into chunks for extra dippers. Serve immediately. Try to share.