Preheat your oven to 400°F.
Peel and cube the sweet potato into bite-sized pieces, then toss with 1 teaspoon of olive oil, salt, and pepper. Spread evenly on a baking sheet.
Roast the sweet potato in the oven for about 20-25 minutes until tender and lightly caramelized.
While the sweet potatoes roast, crisp the turkey bacon in a skillet over medium heat until cooked through. Remove from the skillet and chop into smaller pieces.
In a bowl, whisk the eggs with a pinch of salt and pepper. Stir in the spinach, chopped turkey bacon, and crumbled feta cheese.
Heat the remaining teaspoon of olive oil in a non-stick skillet over medium heat. Pour in the egg mixture and cook gently, allowing the edges to set while the center remains slightly runny.
Place the skillet in the preheated oven for about 8-10 minutes, or until the frittata is fully set but still soft and fluffy.
Remove from the oven, slice, and serve alongside the roasted sweet potatoes.