Grilled New York Strip & Onions with Rosemary Balsamic Butter Sauce
| 8 | tablespoons (1 stick) chilled unsalted butter, divided |
| 1 | large shallot, minced |
| 1/2 | cup balsamic vinegar |
| 2 | large fresh rosemary sprigs |
| 2 | pounds mixed sweet onions, large |
| shallots, baby leeks and green onions | |
| 2 | tablespoons olive oil |
| 4 | 1½ inch thick New York strip steaks (each about 12 ounces) |
| 2 | tablespoons orange juice |