Grilled Balsamic Onions - cooking recipe

Ingredients

red onion, peeled and halved
1/2 cup olive oil
1/2 cup balsamic vinegar

Preparation

Drizzle oil into vinegar very slowly, whisking until it is mixed well.
Marinate onions in mixture for 3 hours.
Grill the onions until browned, about 10 minutes per side, brushing frequently with marinade.