Sauté the onion, spinach, ham, and bacon in a pan. Season with salt and pepper.

Spray a baking dish with oil and place the sliced chayotes in it.

In a blender or similar device, combine the egg whites, cream, cream cheese, and 1 1/2 oz cheddar cheese (or similar).

Add the sautéed mixture and the blended mixture to the dish, along with a handful of grated cheese for melting.

Check the seasoning and bake in the oven for 25 minutes or microwave for 4 minutes.