1Spray 8-inch square (2-quart) glass baking dish with cooking spray. In 10-inch skillet, cook sausage over medium-high heat 5 to 7 minutes, stirring occasionally, until no longer pink; drain.
2In large bowl, mix eggs, baking mix, chiles, cheese and milk. Stir in cooked sausage; pour into baking dish. Cover; refrigerate at least 8 hours but no longer than 24 hours.
3Heat oven to 350°F. Bake uncovered 50 to 55 minutes, or until knife inserted in center comes out clean and edges are deep golden brown. Cool 10 minutes before serving.