In large bowl, beat eggs, milk, salt and taco seasoning mix with whisk. In slow cooker, mix potatoes, sausage, chiles, 1 1/4 cups cheese and the egg mixture; stir to combine. Cover; cook on Low heat setting 2 hours; carefully remove slow cooker's ceramic insert, and rotate insert 180 degrees. Cook 2 to 2 1/2 hours longer or until temperature reaches 160°F in center and egg mixture is set. Let stand uncovered 10 minutes.