Orzo With Feta, Green Beans, And Tomatoes

• 3 vine ripened tomatoes
• 2 garlic (cloves)
• 1 onion
• 325 gr haricots verts
• 240 gr crumbled feta
• 120 gr orzo rice shaped pasta
• 30 ml olive oil
• 16 ml wine vinegar (white)
• 2 gr flat leafed parsley leaves (chopped fresh)