Sautée sliced mushrooms on low-medium heat with a half tablespoon of butter and tablespoon of olive oil. Sautée for about 10 minutes until mushrooms are caramelized and browned. Season with salt and pepper and sprinkle with fresh thyme leaves.
Drizzle olive oil on toast and place your piece of sourdough in oven or toaster oven until desired doneness is achieved. You may need to flip once. Temperature of oven is flexible and toast can be made at either 400°F or on your oven's broil setting.
Add approximately 3 tablespoons of ricotta to toasted sourdough and spread.
Add your sautéed mushrooms on top. Sprinkle some thyme leaves and enjoy!