parisian gnocchi

Name: parisian gnocchi
Ingredients: 1 cup water; 1 stick butter; 3/4 tsp kosher salt; 1 1/4 cups AP flour; 1 tbsp dijon mustard; 1/2 cup Parmesan cheese; 3 eggs ((large)); 2 tbsp parsley ((chopped)); 2 tbsp chives ((finely sliced) - or scallions); olive oil