Banana splitLizzy’s Homemade Ice Cream, 367 Moody St., WalthamFounder Nick Pappas likes letting people choose their own flavors and toppings — although he strongly recommends a scoop of vanilla, chocolate, and strawberry, covered in hot fudge, caramel, strawberries, whipped cream, cherries, sprinkles, and nuts. Pineapple is also very popular. The hot fudge and all the ice creams are made at the store. The large banana split costs $