Grease a 2-quart lidded casserole dish with butter.
Combine all of the ingredients until they are completely combined. Spoon into the greased casserole dish.
Bake in the preheated oven for 55-65 minutes until the center of the casserole is firm and the temperature reaches at least 165 °F to ensure that the raw eggs are cooked safely. The casserole will still be jiggly, this is not a firm sliceable dish.
Remove and serve. This does not slice, this is spooned onto plates like a casserole.
Even if you are making a savory version, you need to add 1-2 tsp of sugar.
Cooking time will vary depending on the depth of your casserole, it's it is a thicker casserole like mine it will take around 60 minutes.