I'm not in Europe but I've visited family in the UK a few times since DS was born. I know I found an organic baby oatmeal at Tesco but I don't remember the brand. As he got older he ate the kids oatmeal but that was Tesco brand so you wouldn't be able to find it anywhere else and I'm not sure it was vegan either, it was my sisters and he stole it
I give DS vitamins now (he just turned 2), Yummi Bears. I don't know if they're available in Europe though. He eats lots of nutritional yeast for B12 but again I've never been able to find that in the UK.
One good range to look out for is Organix. They're for babies and toddlers and several of the products are vegan. At 11 months your little guy could eat the gingerbread cookies and the carrot sticks; they're like cheese puffs only with carrot instead of cheese. My little guy could inhale a packet of those in one sitting at that age. They also have yummy cereal bars, raspberry and apple, but 11 months is a bit young for those. Again I found them at Tesco, don't know where else they'd be available.