We took advantage of the good weather this evening to eat out of door and a certain underage person was rather frivolous with their supper. Came back to the garden to clear it up after bath/bed (and ooo forgetting about it for a bit so letsay a few hours) and saw these. Looked a bit like mushrooms which to my knowledge are not carb consumers but gently prodding with a fork didn't show any stalk (that rhymes). What in heck are they?? Never has the phrase common garden slug struck such fear in my heart. I wouldn't mind confirmation from some knowledgable gardener. (Friendly horror enthusiasts this is a polite request to please stay away)