Ricotta And Pignoli Sauce

• 4 tomatoes (plum)
• 2 garlic (cloves)
• 1 fat ricotta (reduced)
• 1 onion
• 100 gr rotelle
• 70 gr pine nuts
• 40 gr parmesan cheese (grated)
• 30 ml olive oil
• 2 gr mint leaves (chopped fresh)
• some pepper to