01 - Preheat the oven to 400°F. Line a baking sheet with parchment paper.
02 - Wash the sweet potatoes thoroughly. Pierce each several times with a fork and place on the prepared baking sheet. Roast for 35 to 40 minutes, until tender when pierced with a fork.
03 - While the sweet potatoes are baking, heat olive oil in a skillet over medium heat. Add the red onion and bell pepper and sauté for 2 to 3 minutes until softened. Add the spinach and cook for another minute until wilted. Remove from heat and set aside.
04 - Once the sweet potatoes are done and cool enough to handle, cut them in half lengthwise. Gently scoop out a portion of the flesh from each half to create a boat shape, leaving a 1/2-inch border around the edges. Reserve the scooped flesh for another use.
05 - Sprinkle the inside of each sweet potato boat with smoked paprika, salt, and pepper.
06 - Divide the sautéed vegetables evenly among the sweet potato boats.
07 - Carefully crack one egg into each boat. Top with crumbled feta cheese if using.
08 - Return the stuffed sweet potatoes to the oven and bake for 10 to 12 minutes, until the egg whites are set but the yolks remain slightly runny.
09 - Remove from the oven. Top with fresh chives, avocado slices, and a drizzle of hot sauce if desired. Serve immediately.