Preheat the oven to 180°C.
Spray an oven-dish with low-calorie cooking spray and add the feta to the dish. Cook for 10 minutes.
Add the tomatoes, asparagus, leek, green beans and garlic. Spray again and return to the oven for 20 minutes.
Cook the orzo according to the packet instructions, ours took about 10 minutes. Drain, saving the cooking water.
Mash the feta until smooth.
Add the cooked orzo and spinach and stir well. The spinach will wilt from the heat of the pasta and vegetables.
Add the cream cheese and a little of the cooking water, stir well and add a little more water if needed until the sauce has the right consistency for your taste. Season to taste with salt and pepper. Serve.