I bought an Amy's cheeseless pizza and it was soo good. I just could not afford to keep buying them so I created my own version. I have no idea what they use as a sauce but I used onions and it is great.
1 pizza crust, 1 large onion, 3 marinated artichoke hearts, 1/2 cup chopped black olives, 3 mushrooms sliced, olive oil
Spices: Thyme & Basil & garlic powder
Chop whole onion and saute in olive oil until caramelized, while that is cooking add 1 tsp olive oil to pizza crust and spread with wooden spoon sprinkle thyme and basil over crust. Cover entire pizza with the onions, add your other ingredients. Dust with garlic powder and bake in a preheated 450 degree oven for about 12-15 minutes or untill crust is brown.
If you use homemade crust, pre-bake 1/2 way till firm and not brown add toppings then bake till brown