Keto Hamburger Patties with Creamy Tomato Sauce and Fried Cabbage

Ingredients

• 650 g ground beef or ground turkey
• 1 egg
• 85 g crumbled feta cheese
• 1 tsp salt
• ¼ tsp ground black pepper
• 55 g (220 ml) fresh parsley, finely chopped
• 1 tbsp olive oil, for frying
• 2 tbsp butter, for frying
• 180 ml heavy whipping cream
• 2 tbsp fresh parsley, coarsely chopped
• 2 tbsp tomato paste or ajvar relish
• salt and pepper
• 650 g shredded green cabbage
• 130 g butter