Preheat the oven to 350 degrees F. Lightly grease an 9×13-inch baking pan and set aside.
In a mixing bowl, lightly beat the eggs. Add the uncooked quinoa and the remaining ingredients, stirring to thoroughly combine.
Pour into the prepared baking dish and bake, uncovered, for 45-50 minutes or until the casserole is just set in the middle.
Serve warm or allow to cool, and then cover and refrigerate. When serving from the refrigerator, gently reheat if desired. (See serving ideas in comments above.)