In a medium mixing bowl, combine the flour and sugar. Add the milk, water, and 3 eggs and mix well. Refrigerate the batter for 1 hour.

Heat a medium skillet over medium-high heat. Add the bacon and cook it until brown and crisp. Remove the bacon from the pan and drain on paper towels. Pour out half of the grease. Return the pan to the heat and add the leeks, cooking for 1 minute.

In a small bowl, whisk the remaining eggs and add them to the pan, stirring until they start to set but are still a bit runny. Add the tomato, goat cheese and stir until the eggs are cooked but not dry. Remove the pan from the heat and season with salt and pepper to taste.

Meanwhile, preheat a crepe pan or nonstick skillet over medium-high heat and coat the pan with vegetable oil or nonstick spray. Remove the batter from the refrigerator. Coat the pan with about 1/4 cup of batter, cook until the edges start to brown, then flip the crepe. Cook for 10 more seconds and remove from the pan. Keep warm while cooking the remaining crepes.

Place 2 large spoonfuls of the egg mixture in each crepe and roll them. Place 2 crepes on each plate and serve immediately.