Add lentils to a small saucepan, cover with a few inches of water and simmer for 25-30 minutes or until lentils are tender. Drain off excess water and let cool.
Beets:
Preheat oven (or toaster oven) to 425 degrees. Rinse and trim beets and wrap them in foil. Place in oven for 45-60 minutes (depending on size of beets) or until easily pierced with a fork. Let cool and peel skin away, chop into bite-sized pieces.
Vinaigrette:
Add shallot, apple cider vinegar, lemon juice, dijon mustard and maple syrup to a bowl. Slowly whisk in olive oil and season with sea salt and pepper.
Salad:
Place all ingredients in a large bowl, drizzle with vinaigrette and enjoy :)