In a large, deep, skillet, heat oil over medium-high heat. Add ground turkey; season with salt and pepper. Cook, breaking up turkey with spoon, until browned, 9 minutes.
Add onion and jalapenos; cook until soft, 3 minutes. Stir in cumin and tomato paste; cook 2 minutes.
Add cannellini beans, chicken broth, and water; bring to boil. Reduce heat; simmer until thick, 15 to 20 minutes.
Garnish with sour cream, cilantro, and radishes, if desired.