
Transform leftover chicken thighs into a hearty, flavor-packed skillet casserole that comes together in under 30 minutes. This easy boneless chicken thigh recipe is the ultimate weeknight dinner solution.

We have all been there. A container of leftover chicken thighs sitting in the fridge, perfectly good but completely uninspiring on their own. Maybe they were roasted last night, maybe batch-cooked on Sunday. Either way, you are staring at them wondering what shredded chicken dishes could possibly make them exciting again.
This easy skillet casserole is exactly that answer. In under 35 minutes, those boneless skinless chicken thighs transform into a rich, saucy, vegetable-packed dinner that tastes like it took serious effort. Smoky paprika, sweet roasted tomatoes, tender zucchini and creamy cannellini beans all come together in one pan. It is the kind of cooking boneless chicken thighs solution that earns a permanent spot in your weeknight rotation.
This is comfort food that does not make you feel guilty about using last night's dinner. It rewards you for it.
Not all leftover proteins reheat the same way. Chicken breast can dry out the moment it hits a hot pan, but boneless chicken thigh recipes are far more forgiving. The higher fat content in thigh meat means the texture stays juicy and tender even after a second round of cooking.
When you shred or chop those leftover thighs and fold them into a simmering sauce, they absorb every bit of flavor from the tomatoes, garlic and spices. The result is chicken that tastes slow-cooked and deeply seasoned, not reheated. That is the magic of dark meat, and it is exactly why chicken thighs dinner recipes consistently outperform white meat in one-pan dishes like this.
Chef's Tip: If your leftover chicken thighs were seasoned heavily when originally cooked, hold back on adding extra salt until you taste the final skillet. Flavors concentrate as the sauce reduces.
This recipe is built around pantry staples and flexible vegetables, so it works with what you have on hand. Here is what makes it special:
The vegetables listed here are just a starting point. Mushrooms, spinach, corn, or even a handful of olives all work beautifully in this dinner casserole recipe.
Using quality tools makes a real difference when building a one-pan dish like this. A wide, deep skillet with good heat distribution ensures even browning on those aromatics and prevents the sauce from scorching while it simmers.
A few small habits will take this from good to genuinely great:
Toast your spices. That 30-second step where you stir the smoked paprika and Italian seasoning directly into the hot pan before adding the liquids is not optional. Heat blooms the spices and unlocks an entirely different level of flavor.
Do not skip the simmer. Ten to twelve minutes of uncovered simmering lets the sauce reduce and thicken. Rushing this step leaves you with a thin, watery sauce rather than one that clings to every piece of chicken.
Taste at the end. Depending on how your leftover chicken was originally seasoned and whether your broth is low sodium or regular, the salt balance will vary. Always taste before serving.
Pro Tip: A squeeze of fresh lemon juice right before serving lifts the entire dish and adds a brightness that makes all the other flavors pop.
This chicken thigh casserole is satisfying enough to serve on its own in a bowl, but it is also incredibly versatile:
A generous sprinkle of freshly grated parmesan over the top right before serving adds a salty, nutty finish that ties everything together beautifully.
Ready to turn those forgotten leftovers into tonight's best meal? Here is the full recipe:

Transform leftover chicken thighs into a hearty, flavor-packed skillet casserole that comes together in under 30 minutes. This easy boneless chicken thigh recipe is the ultimate weeknight dinner solution.
Heat the olive oil in a large, deep skillet or braiser over medium-high heat until shimmering.
Add the diced onion and red bell pepper. Cook, stirring occasionally, for 4 to 5 minutes until softened and the onion is translucent.
Add the minced garlic and diced zucchini. Cook for another 2 minutes, stirring frequently, until the garlic is fragrant.
Stir in the smoked paprika, Italian seasoning, salt, and black pepper. Toast the spices for 30 seconds, stirring constantly.
Pour in the canned diced tomatoes with their juices and the chicken broth. Stir to combine and scrape up any browned bits from the bottom of the pan.
Add the drained cannellini beans and shredded or chopped leftover chicken thighs. Stir everything together gently.
Reduce the heat to medium-low and let the skillet simmer uncovered for 10 to 12 minutes, until the sauce has thickened slightly and everything is heated through.
Taste and adjust salt and pepper as needed.
Remove from heat and garnish with fresh parsley. Serve hot with a sprinkle of parmesan cheese if desired.
This skillet dinner stores and reheats exceptionally well, making it a fantastic candidate for meal prep. Keep it in an airtight container in the refrigerator for up to 4 days. The sauce actually continues to develop as it sits, so day two is often even better than day one.
For longer storage, portion the cooled casserole into freezer-safe containers and freeze for up to 2 months. Thaw overnight in the refrigerator and reheat gently on the stovetop with a small splash of chicken broth to bring the sauce back to life.
This is the kind of recipe using chicken that earns its place not just as a weeknight shortcut, but as a genuinely craveable dinner in its own right. Once you make it, leftover chicken thighs will never feel like a burden again.