Preheat the oven to 375 degrees F and spray or grease a 13” x 9” casserole dish.

Chop the bacon into bite-sized pieces. Heat a skillet over medium heat and add the chopped bacon. Cook, stirring occasionally, until bacon has reached desired level of crisp, about 3 to 5 minutes.

Add the spinach and basil to the skillet with the bacon and stir well. Cook until spinach has wilted, about 2 minutes. Transfer this mixture to the casserole dish and spread into an even layer.

In a large mixing bowl, whisk together the eggs, sea salt, and one cup of the grated cheese. 

Pour the egg mixture over the bacon/spinach in the casserole dish. Sprinkle with remaining cheese (plus add more if desired).  Bake on the center rack of the oven 35 to 45 minutes, or until the cheese is golden brown and the casserole has set up.