Preheat oven to 400°F. Spray a 9-inch pie dish with nonstick cooking spray.
Spread ham (1 1/2 cups), cheese (1 cup), and green onions (4) in the pie dish.
In a medium mixing bowl, whisk together the rest of the ingredients. The mixture won't be completely smooth, don't worry if there are some lumps. Pour mixture into pie dish.
Bake in preheated oven for 35-40 minutes, or until the tip of a knife inserted in the center comes out clean. Let pie sit for 5 minutes before serving.
Swiss Cheese - I use Swiss cheese in my recipe, but this is another ingredient that can easily be swapped. Swiss has a mild taste and melts beautifully, but you can also use cheddar if you want a sharper bite. Or, if you want to omit the dairy entirely, you can use your favorite dairy-free cheese. Just be sure to swap the milk too!
Bisquick -The starring ingredient! You may have seen other Bisquick impossible pie recipes floating around and wondered what makes them so impossible, and why is Bisquick so versatile? We can owe this adaptable ingredient to a clever train chef — he made his own pre-made biscuit dry mix, and a traveling salesman from General Mills loved the idea so much he altered it for mass production. So now we have Bisquick, which of course makes delicious biscuits, but can do so much more!