Crumble sausage into a large skillet; cook over medium heat until no longer pink. Remove to paper towels with a slotted spoon. Whisk egg substitute and 1/4 cup milk; add to same skillet. Cook and stir until set; remove from the heat., Meanwhile, in a Dutch oven, bring water, salt and remaining milk to a boil. Slowly stir in grits. Reduce heat; cook and stir until thickened, 5-7 minutes. , Stir in half of the cheese. Add the sausage, eggs, green onions and pepper; heat through. Serve in bowls; sprinkle with remaining cheese.