Preheat your oven to 425°F.
Wash the sweet potato and green beans. Dice the sweet potato into 1/2-inch cubes. Trim the ends of the green beans.
In a bowl, toss the sweet potato cubes with half of the olive oil, a pinch of salt, and pepper.
Spread the sweet potato evenly on a baking sheet and roast in the oven for about 20-25 minutes until tender and slightly caramelized.
Meanwhile, in a skillet over medium heat, add the remaining olive oil. Cook the lean ground beef, breaking it up as it cooks, until it is browned and cooked through.
Once the ground beef is nearly done, stir in the egg white to boost the protein without adding extra fat, cooking until just set.
In a separate small pan, lightly sauté the green beans with a dash of salt for about 5-7 minutes to keep them crisp yet tender.
Plate the roasted sweet potatoes on a serving dish, top with the seasoned ground beef mixture, and add the crispy green beans on the side.
Serve warm and enjoy your balanced, nutrient-rich meal.