Combine flour, paprika, salt and pepper in plastic food-storage bag. Add half the chicken; shake to coat. Place flour-coated chicken on plate. Repeat the coating process with remaining chicken.
Stir together remaining flour from plastic bag and 3 tablespoons chicken broth in small bowl.
Heat oil in nonstick saucepan. Add chicken; brown for about 4 minutes. Add onions and garlic; cook 1 minute. Add remaining broth; simmer 2 minutes.
Add potatoes; cook 5 minutes.
Stir in flour mixture; bring to boil. Cook, stirring, 2 minutes or until slightly thickened.
Serve each portion with dollop of sour cream.