Hearty Turkey and Bean Chili

1 pound ground turkey
1 medium yellow onion, chopped
1 yellow or red bell pepper, seeded and chopped
2 cloves of garlic, finely minced or pressed through a garlic press
2 (14.5-ounce) cans diced tomatoes
2 (16-ounce) cans tomato sauce
1 (15-ounce) can red kidney beans, rinsed and drained
1 (15-ounce) can black beans, rinsed and drained
1 tablespoon chili powder
1 teaspoon cumin
1/4 teaspoon black pepper
1/4 teaspoon dried basil
1 teaspoon salt
1 teaspoon brown sugar