Preheat oven to 350°. In a large skillet, cook sausage, green pepper and shallot over medium heat until sausage is no longer pink, 8-10 minutes, breaking sausage into crumbles; drain. Transfer mixture to an 8-in. square baking dish coated with cooking spray. Top with artichokes, broccoli and sun-dried tomatoes., In a large bowl, whisk eggs, egg whites, milk and seasonings until blended; pour over top. Sprinkle with feta., Bake, uncovered, until a knife inserted in the center comes out clean, 45-50 minutes. Let stand 10 minutes before serving. Freeze option: Cool baked casserole; cover and freeze. To use, partially thaw in refrigerator overnight. Remove from refrigerator 30 minutes before baking. Preheat oven to 325°. Bake casserole as directed until heated through and a thermometer inserted in center reads 165°.