Sandwiches with Emmentaler PDO and grilled vegetables

Ingredients

• 4 faluches or round plain or cereal bread rolls
• 1 eggplant, thinly sliced
• 1 zucchini, thinly sliced
• 1/2 sweet pepper each: red and yellow, deseeded, cut into 5 cm strips
• 50 g green asparagus, hard part removed
• 2 + 1 tbsp olive oil
• 1 tbsp dried thyme
• 1 tbsp dried garlic
• salt, pepper
• 4 slices Emmentaler AOP
• Garnish:
• sprigs of flat parsley, arugula, basil
• 2 spring onions, cut into rings on the bias