Make the marinade: whisk 100 ml sunflower oil with 3 tbsp red wine vinegar, 2 tbsp honey, 2 tsp medium-hot mustard, 1 tsp thyme, 0.75 tsp salt, and 0.25 tsp pepper until emulsified. Taste and adjust.
Prepare 4 portions of mixed vegetables (zucchini, fennel, onion, mushroom, cherry tomato, aubergine, etc.) and 1 packet of sheep's cheese. Decide on either large pieces for grill parcels or smaller cubes for skewers.
For the parcel method: cut the vegetables into larger pieces, toss with the marinade, and leave to marinate at room temperature for 1 hour. For skewers: cut into smaller cubes and thread onto roulade skewers, then brush with the marinade and marinate 1 hour.
Preheat the grill to medium-high. For parcels: divide the marinated vegetables and cheese cubes among flat aluminum grill dishes and grill, covered, for 12–15 min, stirring once, until the vegetables are tender and lightly charred. For skewers: grill directly over the heat, turning every 3–4 min, for 10–12 min until charred.
Serve hot, straight from the grill, drizzled with any marinade left in the dish.
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