Veggie pizza

Name: Veggie pizza
Cuisine: European, American, Italian, Mediterranean
Ingredients: 2 sweet potatoes; 1 cup oat flour (whole grain); 0,25 teaspoon salt; 0,5 onion chopped; 0,5 cup tomato puree; 1 teaspoon ground flaxseeds; 1/4 teaspoon chili powder; 1/4 teaspoon salt; 1 teaspoon dried oregano; 1 green onion; 1/3 cup beans canned or cooked; 1/3 cup cheese