Spinach, Leek and Goat Cheese Tart

pie crust dough, rolled and pressed into a 9 inch tart pan (I used Bob's Red Mill Gluten Free Pie Crust)

butter

large eggs plus 1 egg yolk

leek, sliced and cut in half (white and light green parts only)

baby spinach

heavy cream

nutmeg

shredded smoked Gruyere cheese

fresh herb goat cheese, crumbled

green onion, finely chopped

Seasoned salt and pepper for seasoning (about ⅛ tsp each)