Preheat oven to 350°F. Butter a 9x13-inch baking dish.
In a large bowl using an electric hand mixer or stand mixer, beat eggs until light.
Add flour, baking powder, and salt. Mix well.
Add cottage cheese, Mexican cheese blend, butter, and green chilies. Mix until combined. Pour into prepared baking dish. Bake immediately or cover and refrigerate overnight.
Bake, uncovered, for 35-40 minutes or until edges on top are browned and center is set and appears firm. Cool 5 minutes before cutting and serving.
