Baked Spinach and Eggs

firmly packed baby spinach or 1 (10 oz or up to 1 lb) bag fresh baby spinach*

eggs (can increase to 6 if you are using more spinach)

Salt and freshly Ground Pepper,

Tbsp crumbled Feta Cheese for 1-2 eggs (about 2-3 Tbps in total)

Baking spray or a little oil for greasing

*You may use frozen spinach too.