Cook rice according to package instructions.
In a skillet over medium heat, sauté mushrooms with 2 tbsp water for 5–7 minutes until browned. Add garlic and cook 1 minute. Add spinach and stir until wilted (1–2 minutes). Stir in soy sauce, salt and pepper.
Divide rice into bowls, top with mushroom-spinach mix and garnish with herbs.