From simple chicken breast rolls I make a French delight. It looks fantastic!

From simple chicken breast rolls I make a French delight. It looks fantastic! Ingredients: chicken breast - 400 g (14 oz) onion - 1 piece mushrooms - 500 g ( oz) olive oil - 20 ml (0.7 fl oz) salt - 1 teaspoon black pepper - ⅓ teaspoon thyme - 5 g ( oz) sweet cream for cooking - 200 ml ( fl oz) cow cheese - 150 g (5.3 oz) dill - 1 bundle mozzarella - 100 g (3.5 oz) eggs - 2 pieces IN THE OVEN 180 °C (356 °F)/30 minutes