Mackerel Croquettes with Potatoes and Spinach

Ingredients

• 500 g Potatoes
• 1 Sweet onion
• 30 g Butter
• 15 ml Whole grain mustard
• 2.5 ml Turmeric powder
• 2.5 ml Ground cumin
• 2.5 ml Sweet paprika
• 100 g Fresh spinach leaves
• 30 g Fresh parsley
• 200 g Grilled smoked mackerel fillets
• 2 Eggs
• 100 g Breadcrumbs
• à goût Salt
• à goût Freshly ground black pepper
• 200 ml Frying oil (sunflower or peanut)