Marinate chicken in Italian dressing and herb seasoning for at least 30 minutes.
Place chicken in a 20x30cm baking dish and bake in preheated oven for approximately 25 minutes. The chicken is done when the juices run clear.
Shortly before chicken is done, melt butter in a frying pan over medium-high heat until bubbling. Pour in wine, Worcestershire sauce and garlic salt. Bring to the boil. Stir in mushrooms. Reduce to a simmer, cover and cook until mushrooms are tender, about 3 to 5 minutes. Adjust seasoning with salt as needed.
Remove chicken from the oven. Top with chillies, then sliced cheese and dill. Return to the oven until cheese has melted.
Remove chicken from the oven, top with mushrooms and their pan juices. Serve.
Tinned whole green chillies
Can be purchased online. Alternatively, you can use fresh chillies to taste.