This meal was really good and very easy to make.  My three-year-old son even ate it! This came from Healthy Cooking Annual Recipes 2009.  It shows that 1 piece is 345 calories but I imagine it will be lower given that I used soy instead of actual meat.

I made my own dough and if you have never done this before it is SO easy! The recipe I used can be found below:

• 1 (.25 ounce) package active dry yeast (2 1/4tsp for those who do not use packaged yeast)
• 1 teaspoon white sugar
• 1 cup warm water (110 degrees F/45 degrees C)
• 2 1/2 cups bread flour
• 2 tablespoons olive oil
• 1 teaspoon salt

http://allrecipes.com/recipe/quick-and-easy-pizza-crust/

For the Taco Pizza I did mine vegetarian but of course you can replace any of the vegetarian aspects with meat of your choice:

1lb Morning star crumbles (Recipe calls for 1lb lean ground turkey)
3/4 Cup Water
1 Envelope Reduced-sodium taco seasoning
1 Can Vegetarian Re fried Beans
1-1/2 Cups Shredded Cheese (I used cheddar and a Mexican cheese blend)
3 medium tomatoes, chopped
7 cups shredded lettuce

In a large nonstick skillet, cook meat over medium heat until done (drain if you're using actual meat).  Stir in water and taco seasoning.  Bring to a boil.  Reduce heat; simmer, uncovered for 5 minutes.  Stir in refried beans until blended.

So now, basically once you do your dough as the above recipe calls for (you have to cook it in advance) - Spread the mixture over the dough.  Sprinkle with cheese.  Bake at 425 for 5-7 minutes until cheese is melted.  Top with lettuce, tomatoes and any toppings of your choice. We used lettuce, tomatoes, and avocado!