The breakfast sandwich is the best way to start your day.

In researching where the best breakfast sandwiches are in Greater Portland, I found so many places I need to try!

Thanks to Reddit fans of breakfast sandwiches, most of the places listed are in Portland.

One thing is for sure, I have a lot of catching up to do because nothing beats a good breakfast sandwich. It's the perfect way to get all your favorite things in convenient to-go packaging...bread! Or croissant, bagel, focaccia - so many options.

Have you heard of pancake buns? Keep reading.

Are you a sausage fan? Bacon? Ham? Or just veggie?

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Ever wonder who thought up the breakfast sandwich? It was Herb Peterson, a McDonald's franchisee in Southern California. He created the breakfast sandwich in the early 1970s.

It changed the way we all ate breakfast and opened up a whole new market for the fast food industry. Who woulda thunk that the Egg McMuffin was the start of it all?

I don't care how you like your breakfast sandwich, or what you like on it - I guarantee that there will be your perfect sandwich in the following 30 of the best.

READ MORE: The Best Place in Maine for Pancakes is in New Hampshire

If we missed your favorite, let us know! I gotta go on a breakfast sandwich tour in Maine. I've had quite a few of the 21 listed here, but there was a lot that I didn't even know were around! Little holes in the walls that sound amazing. Or places that you would never in a million years think of for a breakfast sandwich.

Be prepared to be hungry!

Best Mouth-Watering Breakfast Sandwiches in Greater Portland

Gallery Credit: Lori Voornas

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Gallery Credit: Sean McKenna