1 cup sliced breakfast sausage (cooked), about 4 links
1/2 cup diced onion
1 1/2 cups chopped mushrooms
2 cups spinach, roughly chopped
1 cup shredded Swiss cheese
1 cup Bisquick
2 cups milk
Salt and pepper to taste
Preheat oven to 400 degrees. Spray deep-dish pie plate with cooking spray.
Chop sausage and veggies and add to a large bowl with shredded cheese. Toss to combine.
Sprinkle mixture into a deep-dish pie plate and distribute evenly.
Add Bisquick, eggs, milk, salt and pepper to large bowl, and whisk by hand for 1 minute.
Pour liquid into pie plate, covering all ingredients. Press down vegetables and try to keep everything covered. It will be very full.
Bake at 400 degrees for about 50-60 minutes, until top is golden and knife inserted into center comes out clean. If it's still too "jiggly" in the middle, bake until more set. Remove from oven and let cool for 10 minutes. Cut and serve.
Enjoy! Perfect for breakfast or an Easter brunch. Refrigerate leftovers.