Turkey Roulade with Orange Butter

Name: Turkey Roulade with Orange Butter
Prep time: 30 min
Cook time: 1 h 20 min
Total time: 1 h 50 min
Yield: 8
Ingredients: 1 kg turkey breast; 1 onion; 150 ml orange juice; 150 ml chicken stock; 1 tbsp plain flour; 1 orange; 150 g butter; 1 tbsp orange zest; 2 tbsp sage; salt, as needed; pepper, as needed; water, as needed