Preheat oven to 350°F. Grease a 9×13″ baking pan.

Cook bacon in a skillet. Set aside.

In same pan, sauté onions till soft, then add spinach until wilted. Let cool.

Whisk eggs, egg whites, milk, salt, and pepper. Stir in cooled spinach mix. Pour into pan and bake for 20–25 mins until set. Cool fully.

Cut eggs into 6 rounds. Assemble sandwiches with egg, bacon, and cheese on English muffins.

Wrap in foil. Store in fridge (4–5 days) or freezer (up to 1 month).

♨️ Reheat Options:

Oven (best): Bake wrapped at 425°F for 8–10 mins (longer if frozen). Broil 3–5 mins to crisp.

Microwave (quick): Defrost 1 min, then heat 30 sec–1 min.

Toaster combo: Toast muffin, microwave fillings, then reassemble. Perfect texture!