Preheat oven to 375°F. Lightly spray 9×13-inch casserole dish with nonstick cooking spray.
In a medium skillet over medium heat, heat 1 tablespoon of olive oil. Add breakfast sausage and cook approximately 10 minutes, breaking into crumbles, until fully cooked through. Remove sausage from skillet and set aside to cool.
In the same skillet over medium heat, add green onions, minced garlic, and red bell pepper. Sauté 4 to 5 minutes until softened.
Add 2 cups chopped fresh baby spinach and stir until wilted, about 1 minute. Remove skillet from heat. Allow mixture to cool at least 5 to 10 minutes.
Meanwhile, in a medium bowl, combine eggs, cottage cheese, sharp cheddar cheese, Member's Mark™ Sea Salt, and Member's Mark™ Black Peppercorn Grinder. Blend with an immersion blender until completely smooth.
Add cooled sausage and cooled sautéed vegetables to blended egg mixture. Stir until combined. Pour mixture into prepared casserole dish.
Bake for 40 to 50 minutes, until casserole is completely firm in center and a knife inserted into center should come out clean. If the top browns before the center is set, cover loosely with aluminum foil for the final 10 minutes of baking.
Allow egg bake to cool at least 10 minutes before cutting into 8 even slices.