Heat oil in non stick frying pan. Sauté chopped onion for approx. 3 minutes (until translucent). Press the garlic cloves through the garlic press or mince finely and add to pan and cook for about 1 minute. Add the tomato paste and stir. Add the freshly chopped and drained tomatoes and the wine and simmer for 1 minute or two. Add salt and fresh ground pepper to taste and oregano. Sauté for another minute and then turn the heat up and bring to a boil, stirring often (add cayenne pepper flakes if you like it hot). Cook, stirring often for about 5 minutes. Reduce the heat to medium and add crumbled feta cheese and large prawns with tails on. Put tight lid on and cook for approx. 3 minutes, until prawns are opaque pink. Add the minced mint right before serving and garnish with a mint or basil sprig on top of each dish. Divide into individual bowls with a few kale leaves on the bottom of each bowl and serve with crusty fresh bread or roasted potatoes and carrots. Yum!!