In a large bowl, combine the marinara, frozen peppers and onions, mushrooms, garlic, and red pepper flakes.
24 ounces marinara sauce, 20 ounces frozen bell pepper and onion strips, 8 ounces sliced mushrooms, 2 tablespoons minced garlic, 1 teaspoon red pepper flakes
Lightly spray the inside of the crock pot with cooking spray. Place the chicken in the crock pot.
2 pounds boneless skinless chicken thighs
Pour the marinara mixture over the chicken, cover, and cook on low for 6-7 hours.
Notes
Prep Tips:
There's no need to thaw the frozen bell pepper and onion strips before using them in the marinara mixture.
Make it a dump-and-go meal by combining all ingredients in a zip-top bag or large bowl ahead of time and storing in the refrigerator, then dump into the crock pot when ready to cook.
Variation Suggestions:
Use different frozen vegetables if desired. You can even mix and match smaller packages of different veggies. I use to use 1 small bag of peppers and onions and 1 small bag of squash sliced (however, now I cannot find frozen squash slices anywhere so I just use the peppers and onions).
Add canned, drained white beans or chickpeas to make it heartier.
Stir in zucchini, spinach, or artichoke hearts in the last 30 minutes of cooking to boost the veggies.
Mix in a splash of red wine or balsamic vinegar for extra depth of flavor.
Top with shredded mozzarella or Parmesan just before serving for a cheesy twist.
Serving Suggestions:
Serve over spaghetti, penne, or fettuccine for an Italian-inspired dish.
Or serve over steamed rice or quinoa.
Pair with toasted Italian bread or garlic bread for dipping into the sauce.
Try with zucchini noodles (zoodles) or cauliflower rice for a low-carb alternative.
Shred the chicken and serve on a toasted hoagie roll for a saucy, messy sandwich.
Storage Info For Leftovers:
Store in an airtight container in the refrigerator for up to four days.
Cool leftover cacciatore completely and freeze in portions for up to three months. Thaw overnight in the fridge before reheating.
Reheat on the stovetop over medium heat or microwave in one-minute intervals until heated through.