Instructions: Combine oil, mustard, thyme, salt and pepper in a large bowl. Whisk to blend well. (Can be prepared 6 hours ahead. cover and let stand at room temperatue.) Prepare barbecue (medium-high heat.) Add potatoes and onions to mustard oil. Toss to coat. Set 1 long sheet of heavy duty aluminum foil

(or 2 sheets of regular) on work surface. Spray foil with PAM. Place vegetables in center of foil. Pour remaining oil over. Cover with more foil; roll in top and bottoms of foil - then each end to make a package.

Seal tightly. Place package on grill; cook approximately 25 minutes.

Remove from grill, slit package top; fold back and garnish with thyme sprigs.

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