Learn to make a roux from scratch. You can make a lot of different meals with a roux. Like a Gumbo, stew, a creole. South Louisiana gumbos and New Orleans gumbos are not the same. Here we make gumbos with and without okra and "NO TOMATOES". For a stew make a roux without as much water so it's thicker add chicken, shrimp, crawfish or make a beef stew. For a Creole, add tomato paste to the roux and brown it, then add shrimp or chicken (also may be called a sause piquant).
roux
1/4 cup oil ( I use just a little bit more)
1/2 cup flour
cook stirring constantly till dark brown. Add 1 oinion. lower heat and cook till onions are soft.
roux is done enjoy.