Chicken, Sausage & Shrimp Gumbo with perfect rue

Bake flour in oven @420 for 45 mins. Sausage was fried in oil used to sear chicken. Onion, green pepper & celery then sauteed in said oil. Shrimp cooked in butter and garlic. ( I used 2 L chicken stock)......1 1/2 cups sliced baby okra

https://m.youtube.com/watch?v=wIzf_b5Gy7k