There are two main reasons why slow cooked ground turkey may seem a bit mushy. The first is overhandling. This dish needs to be stirred just until combined. Mixing with your hands is also a great option. The second is fattier turkey meat. Ground turkey with a higher fat content can become mushier as it slow cooks. To avoid this, buy the leanest ground turkey you can find (less expensive ground turkey tends to include a higher fat percentage).