Chicken Tortilla Casserole

for homemade cream of celery soup*

• 1/4 cup butter
• 1 cup celery finely diced, about 2-2.5 ribs
• 1 cup onion finely diced, about 1 small
• 2 cloves garlic minced
• 1 tsp salt or to taste
• 1/4 tsp black pepper or to taste
• 1/4 cup flour
• 1 1/2 cups chicken broth or stock
• 1 1/2 cups milk I used whole milk

other "soup" (sauce) ingredients

• 1 tsp ground cumin
• 1/2 tsp oregano
• 1/3 cup sour cream room temperature
• 1 tsp salt** for the purpose of this casserole

for rest of casserole

• 20 corn tortillas yellow or white, ripped up into pieces
• 4 cups chicken shredded (think Rotisserie!)
• 16 oz colby cheese shredded