Vegan Hollandaise Sauce - Bianca Zapatka

Name: Vegan Hollandaise Sauce - Bianca Zapatka
Cuisine: British, European
Ingredients: 2.8 oz (80 g) margarine or vegan butter; 2 tbsp (20 g) flour see notes for gluten-free options; 200 ml vegetable broth; 200 ml soy cream or oat cream; 1 tbsp white wine vegan; 2 tsp mustard; 1 tsp lemon juice; 2 tbsp nutritional yeast flakes optional; salt and pepper to taste; 1 pinch of turmeric optional for the color; 1 pinch of Kala Namak optional for "eggy flavor"