Melt the butter with the olive oil and cook the onion with a pinch of salt for 8-10 minutes until soft.
Add the garlic and tomato paste and cook for another 2 minutes.
Add the tomatoes, stock pot, water, salt, pepper and sugar. Break up the tomatoes and simmer for 20-25 minutes.
Add the cottage cheese and blend until completely smooth and silky.
Season with a squeeze of lemon and a good drizzle of olive oil, then taste and adjust the salt.
Ladle into bowls and finish with a little melted butter, olive oil, fresh basil, lemon zest and plenty of black pepper.
