About the only thing that could make a tasty hamburger tastier is serving it on a plush, homemade bun. Answering that call, this recipe employs brewer's yeast and two types of flour. After it's left to rise, the dough is brushed with an egg wash and sprinkled with sesame seeds. The result is a glossy, poofed vehicle for your cheese-topped patty, which you should in turn top with must-have condiments like ketchup, mustard, tomato and sliced red onion.