Preheat the oven to 375°F (190°C).
Cook the sausage in a skillet over medium heat until browned, about 5-7 minutes.
Spread the cooked sausage evenly in the pie crust.
In a mixing bowl, whisk together eggs, heavy cream, salt, pepper, and thyme.
Pour the egg mixture over the sausage, then sprinkle the cheese on top.
Bake in the preheated oven for 35-40 minutes, or until the center is set and the top is golden.
Let the quiche cool for about 10 minutes before slicing.
Serve warm or at room temperature, garnished with fresh herbs if desired.