This breakfast casserole is a combination of multiple recipes I found online. It fed 7 people, including 5 who just ran 11 miles, so it may feed around 10 people who hadn't ran that far :).
1 1/2 cups grated cheddar cheese
6 oz. of cooked ham (or other meat or meat substitute)
1/2 cup grated parmesan
2 small bunches of green onion
1 cup shredded potatoes (fresh or frozen)
2 tbsp milk
Preheat oven to 375 degrees. Chop green onion and ham and grate or shred cheese and potatoes (put 1/2 cup of cheddar to the side).
Scramble ingredients in a large mixing bowl, including a small amount of salt and pepper. Pour into an oven-save casserole dish. Sprinkle remaining 1/2 cup of cheddar on top. Once oven is ready bake for 35-40 minutes. Test with a knife for doneness, eggs should be fluffy and moist but not runny.