Potato croquettes with mozzarella & tomato sauce

For the croquettes:

400 g boiled or jacket potatoes (about 3 medium) 20 g cornstarch ½ tsp sweet paprika Salt pepper 150 g mozzarella, cubed 2 tbsp olive oil

For the sauce:

2 ripe tomatoes, grated 1 tsp dried thyme ⅓ tsp garlic powder 1 onion, chopped 2 tbsp olive oil 1 tbsp fresh basil, roughly chopped Salt pepper