Preheat oven to 400 degrees.
Heat large pan over medium high and cook chorizo until brown (about 5 minutes).
Once fully cooked, add peppers to pan and sauté together with drippings from chorizo for a couple of minutes. Set pan aside.
Spray baking dish with avocado oil, or any nonstick oil, and add chorizo mixture to pan. Add tomatoes and spinach to pan and stir everything together.
Pour whisked eggs into the dish then transfer to oven to bake for 20 minutes, or until the egg has completely set.
Allow to cool slightly before slicing into 8 rectangular pieces. Top with everything but the bagel seasoning and serve.