In a large skillet, cook the carrots, covered, in a small amount of water until tender.
Remove carrots from skillet.
In the same skillet, heat butter; add onion and cook until tender.
Stir in brown sugar and orange juice; simmer 5 minutes.
Add cooked carrots; sprinkle with salt.
Simmer, spooning sauce over carrots until they are glazed and heated through.