Best Chicken Spaghetti Casserole

INGREDIENTS

lbs boneless-skinless chicken thighs (or chicken breasts)

1 lb

spaghetti

2 cans

condensed cream of mushroom soup

1/2 cup

sour cream

2 cups

chicken broth (or reserved liquid from cooking the chicken)

2 cups

sharp cheddar cheese (grated)

medium onion (diced)

8 oz

baby Bella mushrooms (sliced)

1/2

yellow bell pepper (finely diced)

1/2

red bell pepper (finely diced)

1 tbsp

minced garlic

1 tbsp

poultry seasoning

1 tsp

dried thyme

1 tsp

dried rosemary

1/4 tsp

red pepper flakes

1 tsp

seasoned salt

Salt and freshly ground black pepper (to taste)

1 1/2 cups

cracker crumbs (I used Ritz crackers)

8 tbsp

unsalted butter (melted)

1 1/2 cups

cheddar cheese