Here you go. You can use any kind of greens too not just the ones listed. I have thrown in radish greens & Kolrabi greens. Anything will work.
Gumbo z’herbs
11 tablespoons vegetable oil, divided
1 large smoked turkey leg
2 tablespoons (1/4 stick) butter
6 cups sliced leeks (white and pale green parts only; from 5 large)
2 cups finely chopped celery
2 cups sliced green onions (about 8)
1 cup chopped fresh Italian parsley
5 large garlic cloves, chopped
3 tablespoons filé powder*
1 tablespoon chopped fresh oregano
3/4 teaspoon cayenne pepper
8 cups sliced collard greens (about 6 ounces)
8 cups sliced mustard greens (about 6 ounces)
1 large bunch watercress, thick stems trimmed (about 4 cups)
4 cups fresh spinach leaves
1/2 teaspoon sugar
10 cups low-salt chicken broth, divided
3/4 cup all purpose flour
Roast the chicken leg until the skin is crispy. Pull all the meat off the bone and chop it into small pieces. Set aside.
Melt butter a large pot over medium-high heat. Add leeks and celery. Sauté until vegetables are soft, about 8 minutes. Add green onions, parsley, and garlic. Sauté until onions wilt, about 2 minutes. Reduce heat to medium-low. Add filé powder, oregano, and cayenne pepper. Stir 3 minutes. Add collard greens, mustard greens, watercress, spinach, and sugar. Toss to combine. Add 2 cups broth. Cover and cook until all greens are tender, stirring occasionally, about 15 minutes. Remove pot from heat.
Working in batches of 2 cups, puree greens in processor, scraping down sides occasionally. Transfer puree to bowl.
Heat 10 tablespoons oil in same pot over medium-high heat. Add flour; whisk until smooth. Cook until roux is peanut butter color, whisking often, about 7 minutes. Whisk in remaining 8 cups broth and bring to boil, whisking often. Add greens puree, then turkey. Simmer gumbo 10 minutes to blend flavors. Season to taste with salt and pepper. (Can be made 1 day ahead. Cool slightly; chill uncovered until cold, then cover and keep chilled. Rewarm over medium heat before serving.)
Mound 1/4 cup warm rice in center of each bowl. Ladle gumbo around rice.