Begin by spraying your crockpot with non-stick spray.
Next, add the chicken (you can use cubed breast or thighs) and olive oil.
Add the garlic, zucchini, red onion, yellow bell pepper, mushrooms, and tomato sauce.
Next, add the Italian blend seasoning and salt and pepper.
Cook on low for six to eight hours or on high for four hours.
Add salt and pepper to taste and serve over linguini or spaghetti noodles and top with Parmesan cheese.