Prep the chicken: Pat the chicken dry. Season both sides with salt, pepper, Italian seasoning, and smoked paprika.
Optional flavor boost: If you have 5 extra minutes, heat olive oil in a skillet over medium-high and sear the chicken 2 minutes per side. This adds color and deeper flavor but isn’t required.
Layer the slow cooker: Add the chopped onion, garlic, mushrooms (if using), and sun-dried tomatoes to the bottom.
Place chicken on top.
Make the light sauce base: In a bowl, whisk chicken broth with softened cream cheese until fairly smooth. It won’t be perfect, and that’s fine. Pour over the chicken.
Cook: Cover and cook on Low for 4–5 hours or High for 2–3 hours, until the chicken is tender and reaches 165°F internally.
Shred or slice: Remove the chicken to a plate.
Shred with two forks or slice into thick pieces, then return to the pot.
Add the greens: Stir in the spinach, Greek yogurt, Parmesan, lemon zest, and a squeeze of lemon juice. Stir until spinach wilts and the sauce is creamy. Taste and adjust salt or lemon as needed.
Serve: Spoon over whole-grain pasta, brown rice, quinoa, or cauliflower mash. Garnish with parsley or basil.