I would tackle it gradually. Eg as she is used to nursing to sleep, start by still feeding her before nap time but rouse her gently before you put her down, or not feeding all the way to sleep, just until sleepy. Then gradually try to increase the gap between bf and sleep.
Gradually try and reduce the amount of milk she takes (duration of feed) before her nap.
Eventually, the aim being to cut out that feed altogether.
Also, when she wakes from her nap, offer her a feed then, even if she doesn't ask for it. This will help her to start forming the E after S habit for EASY. As you decrease the feed before her nap, she should be hungrier after her nap and so take more. Hopefully then not asking for another feed before the next nap.
HTH