Chop the turkey bacon into bite-sized pieces and finely dice the red and green bell peppers.
Heat the avocado oil in a medium non-stick skillet over medium-high heat.
Add the turkey bacon to the skillet and cook until it begins to brown and turn crisp.
Add the diced peppers to the pan and sauté for 3-4 minutes until they are tender-crisp.
Toss in the fresh baby spinach and stir for 1 minute until just wilted, then remove the bacon and veggie mixture from the pan and set aside.
In a medium bowl, whisk together the whole eggs, liquid egg whites, sea salt, black pepper, and garlic powder until well combined.
Lower the heat to medium and pour the egg mixture into the same skillet, letting it cook undisturbed for 2 minutes.
Gently lift the edges of the omelet with a spatula to let the uncooked egg flow underneath until the surface is mostly set.
Spread the cooked bacon and veggie mixture over one half of the eggs and sprinkle with the shredded pepper jack cheese.
Fold the other half of the omelet over the filling, cover the pan with a lid for 30 seconds to melt the cheese, and slide onto a plate to serve.