Horseradish-marinated Salmon

Ingredients

2 tablespoons prepared horseradish
1 medium onion, chopped
3 tablespoons balsamic vinegar
2 tablespoons olive oil
1 teaspoon chopped fresh rosemary
1 clove garlic, chopped
1/4 teaspoon salt
1/8 teaspoon freshly ground black pepper
Olive oil spray for spraying foil
6 salmon fillets (about 5 ounces each)

Directions