Make the coffee according to the directions on the coffee maker.
Melt the butter in a pan or microwave per instruction above.
Make the crepe batter: In a large mixing bowl, whisk together the flour and the egg. Gradually add in the milk and water, stirring to combine. Add the salt and butter; beat until smooth.
Heat a griddle or frying pan over medium-high heat. While the pan is heating, prep fruit.
Prepare the banana and berries per the instructions above.
Cook the crepes: Lightly grease the griddle or frying pan with nonstick spray. Pour or scoop the batter onto the pan, using approximately 1/4 cup for each crêpe. Tilt the pan with a circular motion so that the batter coats the surface evenly. Cook the crepe for about 2 minutes, until the bottom is light brown. Loosen with a spatula, turn and cook the other side. Repeat for remaining crepes.
To finish the crêpes: Spread nutella inside the crêpe shell, then add in the banana, fold or roll up.
To serve: serve crepes with berries and coffee (with milk and sugar if desired).