Instructions: Slice onions into 1/2-inch-thick rounds.

Whisk together oil, sugar, oregano, salt, coriander, cumin, and cloves in a medium bowl. Add onion. Cover and marinate 1 hour at room temperature.

Prepare grill.

Place onion and marinade on a sheet of aluminum foil. Pull long sides of foil up and over; bring edges together and fold over 3 times.

Fold each short end over 3 times to form tightly sealed package.

Grill packet 5 inches above medium heat, covered with lid, for 30 minutes or until tender, turning 1 or 2 times.

Serve warm or at room temperature.

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