Gluten Free Mushroom and Onion Pizza with Sun Dried Tomatoes

Ingredients

• 1 recipe gluten free pizza crust
• 4 ounces tomato sauce
• 2 tablespoons tomato paste
• 1/4 teaspoon onion powder
• 1/4 teaspoon garlic powder
• 1/8 teaspoon dried basil
• 1/8 teaspoon dried oregano
• 1/8 teaspoon fennel seed
• 1/8 teaspoon sea salt
• 1/4 teaspoon agave
• 1/8 teaspoon freshly ground black pepper
• 1/2 teaspoon red pepper flake
• 2 tablespoons olive oil
• 8 ounces baby Bella mushrooms, cleaned and sliced
• 1/2 cup onions, thinly sliced
• 1 garlic clove, crushed
• 1/4 teaspoon sea salt
• 1/4 cup sun-dried tomatoes packed in oil, finely chopped
• 1/3 cup fresh spinach, cut into ribbons