Ayam dengan Kuah Jamur

Bahan-bahan (4 porsi)

• 600 g / 1.2 lb chicken breasts, boneless skinless, (, 4 small ones (Note 1))
• Salt and pepper
• 2 tsp olive oil
• 1 tbsp / 15g butter
• 2 tbsp / 30 g butter (, separated)
• 120 g / 4 oz mushrooms (, sliced)
• 1 g arlic clove (, finely chopped (or minced))
• 1/4 cup / 35g flour ((3 tbsp))
• 2 cups / 500 ml beef broth ((Note 2 for chicken broth))
• Thyme or parsley