Grilled Onion Guacamole

Grrrrrgh!
Course : Appetizers
From: HungryMonster.com
Serves: 1
 

Ingredients:

2 tablespoons corn oil
2 tablespoons fresh lemon juice
1 tablespoon red wine vinegar
1 teaspoon crushed black pepper
1 teaspoon ground whole cumin seeds
3/4 teaspoon salt
1 large red onion
3 medium avocados
1 large tomato -- diced
2 cloves garlic
3 medium serrano chilies -- chopped
1 bunch fresh cilantro -- chopped
2 tablespoons fresh lime juice -- to taste
 

Preparation:

In a small bowl, combine oil, lemon juice, vinegar, pepper, cumin, and salt. Mix thoroughly. Peel and slice onion 1/4-inch thick and pour marinade over top. Marinate for 1 hour. Drain off liquid and lay the onion slices on a hot grill. Grill for 3 minutes per side. When done, combine with remaining ingredients in a medium bowl until thoroughly mixed. Taste for seasoning, and keep at room temperature until ready to serve.