Preheat oven to 425 F degrees.

Start by making the dough. Pour the yeast over the warm water in a small bowl and stir. In the bowl of your mixer, add the flour, salt and then mix. Add the olive oil and using the dough hook mix for about a min.

Add the yeast mixture to the flour mixture and mix until well incorporated. Shape the dough into a ball and place it in an oiled bowl, rubbing a bit of the oil over the dough as well, cover with plastic wrap and refrigerate until ready to use.

In a bowl toss the sweet potato with the olive oil and season generously with salt and pepper. Place on a baking sheet and bake in the preheated oven for about 20 to 30 minutes or until the sweet potatoes are fork tender and golden brown. Timing depends on size of chopped potatoes.

In a large skillet melt the butter then add onions and cook for about 10 to 15 minutes on medium, stirring occasionally and cook until onions are caramelized.

Preheat oven to 500 F degrees.

Roll out the pizza dough so that it's about 14 inches in diameter and place over a pizza baking sheet. If you don't have a pizza baking sheet, any cookie sheet would do. (You might need to spray some cooking spray over the baking sheet) Bake dough for about 10 to 12 minutes or until golden brown. Remove from oven.

Spread hummus over the cooked pizza. Spread the caramelized onions evenly over the hummus. Top with roasted sweet potatoes, chopped tomatoes and garnish with parsley. Drizzle with some yogurt if preferred and season with salt and pepper.