Sauté mushrooms: Heat a little butter in a pan over medium heat. Add mushrooms and cook until golden, about 4–5 minutes. Add garlic, cook 30 seconds more. Remove from pan and set aside.
Whisk eggs: In a bowl, whisk eggs, heavy cream, salt, and pepper until smooth.
Cook slowly: Lower heat to medium-low, add butter, and pour in the eggs. Stir constantly with a spatula, pushing from edges to center until just set but still glossy.
Add mushrooms: Fold in the sautéed mushrooms and herbs. Stir gently until combined and creamy.
Serve: Plate immediately, garnish with extra herbs, and enjoy warm.