Healthy Pizza Recipe

I'm always looking for ways to make a different dish with the same ingredients.  Today, I came up with an idea to make a pizza out of whatever I had in my freezer.  I saw this recipe from some fitness forum long time ago, but I just couldn't find it today.

Anyway, I don't know if I missed anything, but it ended up pretty good.  It actually tasted good.  I didn't measure grams or anything, but it should be roughly 300-400 calories total.  The only thing I know for sure is that I used 4oz of 99% fat free chicken breast.

Ingredients :
4 oz organic chicken breast, sliced (not on the photo)
2 tbsp of low fat spaghetti sauce (not on the photo)
1 organic whole wheat tortilla
1/2 tomato, sliced
1/2 cup of Baby Bella mushrooms
1/2 cup of organic mixed pepper strips
Little bit of low-fat cheese

It took me about 10 minutes to make this healthy pizza. I only used healthy ingredients and used very little olive oil. About 1/2 tbsp. So try it. It is easy and tasty!