Another Portland food cart is turning into a brick-and-mortar restaurant.

High Roller Lobster Co., in business since 2015, is known for its lobster rolls, crab rolls, lobster grilled cheeses, and cheese crisp taco stuffed with lobster. Now it’s opening a 50-seat restaurant with a bar area and counter service at 104 Exchange St., the former location of the Portland Meatball Co., according to its application filed with the city.