Baked Eggs with Mushrooms (Shirred Eggs)

Bahan-bahan (4 porsi)

• 30 g / 2 tbsp unsalted butter
• 200 g / 7oz mushrooms (, sliced thinly (0.3cm / 1/8"))
• 2 cloves garlic (, finely minced)
• 2 tsp fresh thyme leaves
• 1/4 tsp cooking / kosher salt
• 1/8 tsp black pepper
• 4 cups baby spinach
• 4 large eggs (, fridge cold (Note 1))
• Pinch salt and pepper
• 1/4 cup thickened cream ((heavy cream))
• 4 tbsp parmesan (, freshly grated)
• 1/8 tsp smoked paprika ((optional))
• 2 tsp chives (, finely chopped (optional))