Preheat oven to 375°. Spray a 13×9-inch baking dish with cooking spray.
In a large saucepan, bring 2 cups water, broth, salt, and pepper to a boil over medium-high heat. Gradually whisk in grits and flour. Reduce heat, cover, and simmer, whisking occasionally, until tender, 15 to 20 minutes. Remove from heat.
In a medium bowl, whisk together 2 eggs; gradually whisk in 1 cup hot grits. Whisk hot egg mixture into remaining grits. Stir in sausage, cheeses, and sage. Pour into prepared pan, and loosely cover with foil.
Bake for 20 minutes. Uncover and bake 15 minutes more.
Using the back of a spoon, make 6 indentations in grits. Crack remaining 6 eggs into indentations. Bake until eggs are soft set, about 8 minutes, or to desired doneness. Let stand for 5 minutes before serving. Garnish with cheese, tomato, sage, and additional salt and pepper, if desired.
Recipe by Paula Deen Magazine at https://pauladeenmagazine.com/smoked-cheese-grits-sausage-egg-bake-recipe/