To make the chili, bring a large pot sprayed with nonstick spray to medium heat on the stove. Add all of the ingredients -- including the reserved tomato juice -- except the macaroni, cheese, and optional spice. Stir thoroughly. Cover and cook until the veggies are tender, about 15 minutes, occasionally removing the lid to stir.
Meanwhile, in another large pot, prepare the macaroni according to the package instructions. Drain and set aside.
Once both are cooked, add the drained pasta to the pot of chili. Mix thoroughly. If you like, season with cayenne pepper, additional chili powder, and additional cumin, to taste. Evenly top each serving with 1 tablespoon of cheese and enjoy!