Mushroom Piccante

• 3 tomatoes
• 1 onion
• 1 clove garlic
• 250 gr mushrooms (white)
• 60 ml wine vinegar
• 60 ml olive oil
• 18 gr capers (drained)
• 6 gr salt
• 2 gr itl (chopped)
• 1 gr basil leaves (dried)