Defrost shrimps at room temperature. Peel and finely dice onions and garlic. Clean and wash the chillies and cut them into fine rings.
Heat the oil and fry the prawns in it in portions for approx. 3 minutes, turning them over. Season with salt and pepper. Remove from oven, sauté onions and garlic in cooking fat for about 5 minutes. Add the tomatoes and chop with a spatula.
Season with salt, chilli and sugar. Bring to the boil and simmer for about 10 minutes while stirring.
Meanwhile, prepare the pasta in boiling salted water according to the instructions on the packet. Add shrimps and peas to the sauce, bring to the boil and keep warm in a closed saucepan. Wash the basil, shake dry, pluck leaves from the stalks and chop, except for something to garnish.
Season the sauce with basil, except for something to sprinkle on top. Drain the pasta, let it drain for a short time, put it back into the pot. Add sauce and fold in. Serve and sprinkle with basil and garnish.