Preheat the oven to 375°F (190°C).
Prepare the sweet potatoes by washing and cubing them into small bite-sized pieces. Toss the cubes in olive oil, a pinch of salt, and black pepper.
Spread the sweet potato cubes evenly on a large baking sheet and roast in the oven until tender and slightly caramelized, about 35-45 minutes, stirring halfway through.
While the sweet potatoes are roasting, place the turkey breast on another baking tray. Season lightly with salt and pepper and roast in the oven until warmed through and edges begin to crisp, about 20-25 minutes.
In a very large mixing bowl (or several, depending on available capacity), crack the eggs and whisk them until smooth. Season with a little salt and pepper.
Heat a very large non-stick skillet or several skillets over medium-low heat. Pour in a portion of the whisked eggs and gently scramble them until softly curdled. Repeat until all eggs are cooked, keeping them warm.
In a giant serving dish, combine the scrambled eggs, roasted turkey breast (sliced or chopped into bite-sized pieces), and the roasted sweet potato hash.
Toss gently to mix the flavors, adjust seasoning if needed, and serve immediately while everything is warm.