Grilled Onions

12 8 in. wooden skewers
1 medium-size red onion
1 medium-size sweet onion
1 1/2 C. dry white wine
1/4 C. butter
1 tsp. chopped fresh thyme
1 tsp. pepper

Insert 4 wooden skewers, one at a time, through each onion about 1/2 in. apart to create horizontal segments. Cut onion into slices between skewers, leaving skewers in place.
Place onion slices in a shallow container; add wine. Cover and chill 8 hrs., turning occasionally. Drain.
Melt butter in a small saucepan; stir in thyme and pepper. Brush onion slices with butter mixture, reserving some for basting.
Grill onions, covered with grill lid, over medium-high heat (350-400 degrees) 10 min., turning and basting often with reserved butter mixture.