preheat oven to 350°
put sausage links in oven proof dish and bake for 15-20 minutes. slice into 1/4" sections
while sausage is cooking, Saute onions in oil
in large bowl, add eggs, milk, spices and whisk to combine. add: potatoes, 1 cup cheese, sausage, onions. mix.
spray 13x9 baking dish and pour mixture into it. sprinkle remaining cheese on top
increase oven temp to 375. bake for 30-40 mins or until set and light golden
allow to set for 10 minutes before serving