Preheat oven to 400°F and line a baking sheet with parchment paper.
Peel and dice the sweet potato into 1/2-inch cubes, then toss them with olive oil and 0.125 tsp sea salt directly on one side of the baking sheet.
In a medium mixing bowl, combine the ground beef, egg, almond flour, finely diced onion, minced garlic, half of the tomato paste, 0.25 tsp sea salt, black pepper, and dried thyme.
Mix the ingredients by hand until just combined, being careful not to overwork the meat to ensure a tender texture.
Shape the mixture into a compact loaf and place it on the other side of the baking sheet next to the potatoes.
Brush the remaining tomato paste over the top of the meatloaf to create a savory glaze.
Bake for 25 to 30 minutes or until the meatloaf reaches an internal temperature of 160°F and the sweet potatoes are golden and tender.
Allow the meatloaf to rest for 5 minutes before slicing to keep the juices intact.