Preheat your oven to 425°F.
Peel and dice the sweet potato into chunks. Boil in lightly salted water until tender, about 15 minutes.
While the sweet potato cooks, cut the zucchini, red bell pepper, and red onion into bite-sized pieces. Toss them with olive oil and freshly chopped parsley, then spread on a baking sheet.
Roast the vegetables in the preheated oven for 15-20 minutes until tender and slightly caramelized.
Season the lean beef with a pinch of salt and pepper. In a hot skillet over medium-high heat, sear the beef for about 2-3 minutes per side until nicely browned. Reduce cooking time to keep the meat tender and within our protein goal.
Drain the sweet potato and mash until smooth, adding a pinch of salt if desired.
Plate the mashed sweet potato as a base, then arrange the seared beef on top. Neatly spoon the roasted vegetables around the plate.
Top the beef with a small dollop of nonfat Greek yogurt and scatter blueberries over or on the side, adding a burst of freshness.
Serve immediately and enjoy this balanced dinner that seamlessly blends savory seared beef with sweet and herbaceous components.