Preheat oven to 350 degrees. Lightly grease the muffin pan or line with paper liners
Heat a large skillet over medium-high heat. Add sausage and cook 10 to 15 mins; until evenly browned. Take out and let the grease drain
Beat the eggs in a bowl and stir in the onion, green or red pepper, salt, pepper, and garlic powder. Mix in sausage and Cheddar cheese. Start spooning mixture into the muffin cups
Bake for 20 to 25 mins; until a knife inserted near the center comes out clean. Top with scallions to garnish
