GRILLED ONIONS WITH TARRAGON MUSTARD SAUCE
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Tarragon Mustard Sauce:

2 tbsp white wine or tarragon vinegar

2 tbsp Dijon-style mustard

0.33 cup (80ml) olive oil

2 tbsp chopped fresh tarragon or 1 tsp dried tarragon

0.25 tsp salt

pinch of freshly ground pepper

Onions:

4 yellow onions

3 tbsp olive oil

0.5 tsp salt

0.25 tsp freshly ground pepper

Prepare a fire for indirect-heat cooking in a covered grill. Position the grill rack 4-6 inches (10-15 cm) above the fire.

To prepare the tarragon mustard sauce, in a small bowl, whisk together the vinegar and mustard. Slowly add the olive oil, whisking constantly to form a smooth, creamy sauce. Whisk in the tarragon, salt and pepper. Cover and set aside.

To prepare the onions, peel them carefully; take care to keep their layers intact at the root ends which will help hold them together during cooking. Using a sharp knife and starting at the stem end, slice an X in each onion to within about 1 inch (2.5 cm) of the root end. In a large bowl, toss the onions with the olive oil, salt and pepper.

Place the onions on the center of the rack, cover the grill and open the vents halfway. Cook, turning the onions every 15-20 minutes, until they are tender when pierced with the tip of a sharp knife, 45-50 minutes total.

To serve, transfer the onions to a platter and drizzle some of the sauce over them. Serve hot, warm, or at room temperature. Pass the remaining sauce at the table.