To make bagels: In bowl, mix yeast, sugar and 1/2 cup lukewarm water; let rest 5 minutes.
In separate large bowl, place flour and add yeast mixture, remaining lukewarm water and salt. Mix thoroughly with hands until homogenous mixture is obtained. Transfer to greased bowl, cover with plastic wrap and let rise 1 hour.
Once dough rises, place on flat surface and divide into eight equal parts. Form small dough balls and, using finger, make hole in center of each to form bagels. Place on baking sheet, cover with kitchen towel and let rise 15 minutes.
Preheat oven to 390 F.
In pot of hot water over medium heat, cook each bagel 5 seconds, making sure they do not stick to each other. Remove from water and drain thoroughly. Place on parchment paper-lined plate, sprinkle with sesame seeds and bake 25 minutes.
To make bruschetta: On cutting board, use knife to cut tomatoes in half. Transfer to bowl; add olive oil, garlic and basil then mix. Set aside.
To make topping and serve: Cut bagels in half, place on cutting board and use knife to spread goat cheese on each bagel half. Add bruschetta and drops of balsamic vinegar then sprinkle with salt and pepper, to taste.