Preheat oven to 300°F (150°C). Place a 9x13 baking dish with 1 inch hot water on bottom oven rack to create steam.
Add eggs, cottage cheese, garlic powder, onion powder, salt, and pepper into a high-speed blender. Blend for 30-45 seconds until silky smooth and frothy.
Distribute shredded cheese, bell peppers, and scallions into 12 silicone muffin cups.
Pour blended egg batter over fillings until 3/4 full. Bake on middle rack for 28-32 minutes until set.
Let cool 5 minutes, pop out of silicone cups, and enjoy immediately or store for meal prep!