01 -
Lightly grease the inside of the slow cooker insert using non-stick spray or softened butter to prevent sticking.
02 -
For enhanced flavour, sauté diced onion in a small pan over medium heat with a teaspoon of butter or olive oil until softened, about 3 to 4 minutes. Set aside to cool.
03 -
In a large mixing bowl, vigorously whisk the eggs with milk, garlic powder, ground black pepper, salt, and dried thyme (if using) until homogeneous.
04 -
Fold the diced ham, shredded cheese, sautéed onion, and optional spinach or bell peppers into the egg mixture, mixing gently to distribute evenly.
05 -
Pour the prepared egg mixture into the greased slow cooker, spreading the ingredients into an even layer.
06 -
Secure the lid and cook on low setting for 4 to 5 hours or on high setting for 2 to 3 hours, until the centre is set and fully cooked through. Avoid lifting the lid during the first hour to prevent heat loss.
07 -
Once set, allow to cool for 10 minutes. Slice into wedges and serve warm, garnished with chopped parsley if desired.