First you need to plan ahead and only go out to catch her when you have lots of time.
My horses are fed at least once a day, as I would go out with the grain I would chase the other horses off and no body got fed until I gave the colt a couple hand fulls of grain. It only took a couple feedings for him to be the first one up to me when I went out. Then I would give the other horses their feed and go back to the colt. He got his feed and I would slowly rub his shoulder and neck and as he got more comfortable with my touch I would take the lead rope and rub his neck, put the lead over his neck and pet him some more, then let him go.
After a few days of that I would add the halter to the mix, put the lead rope around the neck, slide the halter on, pet him and let him eat then let him go.
Now I go out, put the rope around his neck, slide the halter on, lead him to his stall and give him his feed. I brush him and rub him and pick up his feet, scratch his butt and generally play with him while he's eating, then I take the halter off and let him go.
He don't mind being caught at all now.
I've done this same technique with several hard to catch horses, some that the owner said would take them more than an hour to catch. The first few times it may take a while, but the horses learn very quickly. Just don't loose your patience.
I do not leave halters on, and I do not hide the lead rope, the horse needs to come to me when they see me with their lead & halter. Every time I went to the pasture to feed or work with the colt I had the halter and lead rope hanging on my shoulder, it became part of the daily routine.