Season the hamburger meat with 1 tablespoon taco seasoning and brown over medium heat. Once browned, stir in the roasted tomatoes until heated through. Set aside.
Heat 1 Tablespoon oil in a large nonstick pan over medium-high heat. Add the polenta rounds and season with salt & pepper. Cook until golden brown, about 3-5 minutes per side.
Place 2-3 rounds per plate and top with taco meat, avocado, sour cream, cilantro and a sprinkle of additional taco seasoning.