Preheat your oven to 375°F and grease a 12-cup muffin tin with olive oil. This prevents sticking and ensures your summer egg muffins family recipe bakes evenly without any frustrating cleanup afterward.
In a large mixing bowl, whisk together 8 eggs and 1/4 cup milk until completely combined and slightly frothy. Season the mixture with salt, black pepper, and garlic powder, stirring well to distribute seasoning throughout.
Fold in all diced vegetables—bell peppers, zucchini, tomatoes, onion, and spinach—along with shredded cheddar cheese and smoked turkey pieces. Stir gently until all ingredients are evenly distributed throughout the egg base.
Divide the mixture evenly among the 12 muffin cups, filling each about three-quarters full. Top with fresh parsley and any remaining cheese if desired for extra flavor and presentation appeal.
Place the muffin tin in the preheated oven and bake for exactly 20 minutes until the tops are golden brown and a toothpick inserted in the center comes out clean. Let cool for 3-5 minutes before removing from the tin carefully.