Shrimp In Greek Tomato Sauce With Feta

• 5 ripe tomatoes (very)
• 1 onion (yellow)
• 1 clove garlic
• 475 ml greek tomato sauce
• 375 gr shrimp
• 240 ml dry wine (red)
• 120 ml clam juice
• 120 gr feta cheese
• 45 ml olive oil
• 4 gr oregano (whole)