Sainfoin - how to establish in existing wildflower meadow?

I collected a cup full of sainfoin seeds on a walk today. I’d like to get some established in our small wildflower meadow.

All planting instructions I have seen are aimed at farming, and start with tilled bare soil. Tilling in this case is not an option, because we have other species to preserve and don’t want a mono crop.

So how would you attempt this? I have considered:

1) Grow a bunch of plugs and transplant

2) mow hard and rake off material, broadcast sow (expecting low germination rate)

Others??

I would definitely plant seedlings.  I have had poor luck with broadcasting seed into existing meadow - the grasses twine together at the surface and seem to keep out my wished-for new plants!

How about a compromise where you just till and prepare soil in a small strip within your existing meadow? Then by broadcasting your seeds there and babying them along, they'll grow up to be big and strong and ready to naturally drop enough seeds of their own to sally forth and become part of the rest of your meadow with the least amount of effort.