For the chicken sausage: If raw, cook in a 400°F oven to an internal temperature of 160°F using a thermometer. If already cooked: Preheat a non-stick pan over medium heat and brown the chicken sausage slices on each side.
Preheat the oven broiler on low.
Spread the goat cheese on each slice of bread then top with sliced tomatoes. Place underneath the broiler until the tomatoes are soft and somewhat blistered.
Preheat a non-stick pan over low-medium heat with oil. Crack eggs on a flat surface and into the pan being careful not to break the yolk. Cook until the whites of the eggs are firm and no longer runny (about 3-4 minutes). Then flip the eggs using a spatula and cook for 30 seconds longer.
Serve the eggs with goat cheese toast, drizzle with olive oil, season with salt and pepper. Garnish with chives. Serve with chicken sausage and mango.