Before cooking, dilute tomato paste in 1 glass of hot water. This will make the consistency of the sauce more uniform.
Grind raw cashew nuts in a coffee grinder or blender and heat them in a dry frying pan for 2-3 minutes. Then add olive oil, pepper, basil and stir.
Pour tomato paste diluted with water into the resulting mixture and simmer over low heat, stirring constantly.
When the sauce begins to thicken a little, remove it from the heat and cover with a lid to retain the flavor. Serve the sauce over pasta or meat warm or chilled to suit your taste.
This sauce can be stored in the refrigerator for several days, using it in different dishes.