Preheat your oven to 375°F (190°C) and lightly grease a small oven-safe baking dish with the avocado oil.
In a skillet over medium heat, cook the bacon slices until they begin to crisp, then brush both sides with maple syrup and cook for 1 more minute until glazed and golden.
Remove the bacon from the skillet, let it cool slightly on a plate, and then chop it into bite-sized pieces.
In the same skillet, sauté the diced red bell pepper and fresh spinach over medium heat until the spinach is wilted and the peppers are tender.
In a medium mixing bowl, whisk together the large eggs, egg whites, sea salt, and black pepper until the mixture is well combined and slightly frothy.
Spread the sautéed vegetables evenly across the bottom of the prepared baking dish, pour the egg mixture over the top, and sprinkle with the chopped maple-glazed bacon.
Bake for 20 to 25 minutes, or until the eggs are fully set in the center and the edges are lightly browned.