Step 1

Preheat the oven to 350 degrees F.

Step 2

Grease a 9x13-inch baking dish.

Step 3

In a large skillet over medium heat, cook the bacon and the onion until the bacon is crisp, about 5-8 minutes.

Step 4

Drain the fat from the skillet.

Step 5

In a large bowl, combine the eggs, the hash browns, the cheddar cheese, the cottage cheese, and the Swiss cheese.

Step 6

Stir the cooked bacon mixture into the egg mixture.

Step 7

Transfer the mixture to the prepared baking dish.

Step 8

Bake, uncovered, until a knife inserted into the center comes out clean, about 35-40 minutes.

Step 9

Let the casserole stand for 10 minutes.

Step 10

Serve garnished with the green onions.