Season goose breasts with next 3 ingredients. Heat oil in a large skillet over medium-high heat. Add goose and sear until browned on one side, about 3 to 4 minutes.
Flip breasts over and cook for 3 to 4 minutes more.
Add orange juice and vinegar to pan and cook for 2 minutes more.
Add garlic, onions, soy sauce and honey.
Cover and cook for 2 minutes more.
Remove goose breasts when medium-rare and let stand.
Reduce liquid to a fesw tablespoons.
Remove pan from heat and whisk in chilled butter until melted.
Slice goose breasts and arrange on plates.
Spoon sauce over and garnish with orange segments.