Place turkey in the slow cooker and season with salt and pepper, if desired.: As you nestle the tenderloins into the pot you'll notice their pale pink sheen and firm texture, which will relax as they heat. Press them gently into the base so they sit snugly and make sure there is some space for the sauce to surround them, this helps distribute heat evenly. The initial seasoning step is subtle, and if you skip extra salt you can always adjust at the end after tasting the sauce. One common mistake is piling too many pieces on top of each other, which can prevent even cooking and leave a cold center, so spread them in a single layer or slightly overlapping for best results.
Whisk together soup, soup mix, and chicken broth. Pour over turkey.: When you combine the condensed soup, the two seasoning packets and the low sodium broth you'll first see a thick paste transform into a glossy, pourable sauce. Whisk until there are no dry pockets of mix left, and watch for a smooth sheen that indicates the soup has rehydrated. This action helps the flavors marry and prevents clumping once it hits the hot meat. A typical pitfall is not whisking thoroughly, leaving gritty dried mix, so take an extra 30 seconds to ensure homogeneity. You should be able to smell the herb and garlic notes as the mixture comes together, a nice preview of the finished dish.
Cover crock-pot and cook on LOW for 4-6 hours.: As the sauce cascades over the tenderloins you will hear a soft pour and see the meat take on a glossy coating, which signals good coverage. Tilt the slow cooker slightly or use a spoon to nudge the sauce under any exposed parts so every surface is bathed. This step allows the seasonings to penetrate during the long, slow cook, building depth rather than sitting on top. A frequent oversight is pouring unevenly and leaving pockets of dry meat; moving the liquid around ensures consistent flavor throughout.
Before serving break the turkey tenderloins into bite-sized pieces.: Once the lid is on you will notice a gentle steam forming at the rim and a subtle, simmering aroma after an hour or two. Cooking on low converts collagen in the meat into gelatin slowly, resulting in tender, juicy pieces rather than dry shreds. Listen for a steady, soft bubbling in the first hour to confirm heat, and avoid lifting the lid frequently which releases heat and lengthens cook time. A common mistake is setting the cooker too high, which can dry out the meat; low and slow gives you that fall apart texture with reliability.
Before serving break the turkey tenderloins into bite-sized pieces.: As you lift the lid at the end you'll see the meat pull apart easily and the sauce cling to its surface, creating a glossy, appetizing finish. Using two forks or tongs, break the tenderloins into pieces that show juicy strands rather than tough fibers, this enhances presentation and makes it easy to portion for plates. The aroma will be savory and herb forward, and the sauce should coat each piece rather than separate. One troubleshooting tip is to let the meat rest for 5 to 10 minutes in the warm cooker with the lid off if the sauce seems thin, it will settle and thicken slightly before serving. Avoid cutting into very large chunks, because smaller pieces absorb the sauce better and are more pleasant to eat.