In a large pot of boiling salted water, cook pasta, drain it and keep aside
In a hot frying pan add olive oil and toss the shrimps. Keep aside
Add olive oil in same frying pan and add chopped onion, garlic and chili. Stirring frequently, until fragrant, about 1-2 minutes. Then add chopped tomato, tomato puree and salt and some of the pasta boiling water.
Add the shrimp and cook, stirring occasionally, until pink, about 1-2 minutes then add lemon juice
Add pasta and stir well and remove from heat and sprinkle chopped parsley and parmesan cheese.