Olives are full of healthy monounsaturated fats, which help reduce 'bad cholesterol'. They're also full of antioxidants.
Mushrooms are a source of protein, vitamins and minerals, in particular B vitamins, vitamin D and selenium, an antioxidant.
This sauce allows lots of vegetable matter and much less fat, due to reduced oil, no meat and even no dairy.
Tomatoes are rich in a ton of good things, including lycopene, which some believe reduces the risk of heart disease.
Seasoning comes by way of balsamic and nutmeg, not salt.