Preparation:

Preheat large skillet to medium-high. Cut sweet potatoes to desired shape. (Thinner cuts will yield more crispy fries.) Add canola oil to skillet and heat. Add potatoes and cook until desired crispness (minimum of 10 minutes), mixing only occasionally. Add salt and pepper to taste.

While sweet potatoes are cooking, preheat skillet to medium. Combine ground beef, bread crumbs, seasoning salt, and blue cheese dressing in large mixing bowl. Mix well. Shape into four large patties. Grill on skillet until center is fully cooked, about 5 to 7 minutes per side.

In a small bowl, mix mayonnaise and blue cheese crumbles. Slice tomato into four to six large slices. Split hamburger rolls and place burger on bottom half. Top each burger with ¼ mayonnaise mixture and one to two tomato slices. Cover with top of roll. 

Separate sweet potato fries into four equal portions. Serve burger with sweet potato fries and side of 1 tbsp ketchup.