Tomatoes Potato Onion Sou

INGREDIENTS 2 tablespoons butter - divided 1 small yellow onion - finely chopped 5 cloves garlic - minced ~2 cups diced sweet potato - from 1 small sweet potato 1 28 ounce can tomatoes, can use crushed, fire roasted or whole tomatoes 1 ½ teaspoons salt black pepper to taste 1 teaspoon pap