Breakfast Strata

Preheat oven to 350° and grease a 9"-x-13" baking dish with butter. In a large skillet over medium-high heat, add sausage and cook, breaking up large pieces with a spoon, until golden, about 7 minutes. Remove from heat and let cool. In a large bowl, whisk together eggs and milk and season with salt and pepper. Gently fold in bread, 1 cup cheese, spinach, mushrooms, tomatoes, and cooked sausage.  Pour mixture into prepared baking dish. Top with remaining 1/2 cup cheese and bake 50 to 55 minutes, until cheese is golden and no liquid remains. Garnish with basil before serving.