This vegetarian chard and mushroom quiche is a delicious and nutritious dish that is perfect for brunch or a light dinner. The combination of sautéed Swiss chard and mushrooms gives the quiche a rich and earthy flavor, while the creamy filling made with eggs, milk, and cheese adds a satisfying texture. The flaky homemade crust adds the perfect touch to this savory dish. Serve it warm or at room temperature with a side salad for a complete meal.