Preheat oven to 400°F.
Wash the sweet potato and slice thinly, lengthwise.
Cover a large baking sheet with parchment paper or foil. Lay out the thinly sliced sweet potato in a single layer on the baking sheet.
Melt 2 T coconut oil in a small glass bowl in the microwave (approximately 30-40 seconds) and then brush the sweet potatoes on each side. Bake for 20-30 minutes, until cooked through and lightly browned.
While the potato is baking, bring a medium saucepan filled with water to a boil, then reduce heat to just under boiling.Add ½ teaspoon of white vinegar to the water. Crack.the eggs into the water and cook for exactly 4 minutes.Remove the eggs from the pot with a slotted spoon.
Slice the avocado into thin slices.
To serve, layer the potato, avocado, cucumber, and smoked salmon, then top with the egg and a sprinkle of dill.