If I feel I need something more solid with my soup, then:
bought or home made low carb bread, or savoury shortbread, with butter and maybe cheese, focaccia made with Sukrin flour, black olives & rosemary from a recipe on the packet, suitably flavoured microwaved muffins, or my favourite - parmesan crisps, to which I'll occasionally add a little milled golden flaxseed. But not any of these ever get dunked!
Bread & foccacia I bake in oven, microwave muffins can be cooked this way too, and so I believe can the parmesan crisps.
Robbity