Preheat oven to 425°F.

Cook the spinach and drain well.

Melt the butter in a skillet over medium heat.

Add the onion and garlic and cook for 2 minutes.

Add the spinach.

Cook and stir until any excess moisture is gone.

Place in a large bowl.

Add the cheese, eggs, milk, basil, and celery salt.

Mix well.

Spoon into prepared pie shell.

Arrange the cherry tomatoes around the edges of the filling.

Bake for 15 minutes.

Decrease the oven temperature to 350°F and bake for 10 minutes.

Mix bread crumbs with Parmesan cheese and sprinkle over the top of the quiche.

Bake for a final 10 minutes.

Let cool for a bit before slicing.