Peel and chop the onion and garlic. Clean, wash and chop the peppers. Heat 2 tablespoons of oil in an ovenproof pan. Sauté the onion, garlic and paprika. Add the tomatoes and chop them coarsely in the pot with a spatula.
Season with salt, pepper and sugar. Let simmer for about 20 minutes.
Wash and peel the asparagus and cut off the woody ends. Cook the asparagus in boiling salted water with 1 teaspoon sugar for about 12 minutes. Drain, rinse with cold water and let drain. Cut the asparagus into large pieces.
Wash the parsley, shake dry. Pluck off leaves and chop finely. Mix parsley and asparagus into the sauce. Crumble the feta and sprinkle over it. In a preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: see
manufacturer) bake for 12-15 minutes.
Wash the prawns, dab dry. Heat 2 tablespoons of oil in a frying pan. Fry the prawns in it for about 2 minutes on each side. Season with salt and pepper. Take Saganaki out of the oven, spread prawns on top.
Serve immediately.