Avocado Toast Eggs Benedict

Name: Avocado Toast Eggs Benedict
Ingredients: For the Avocado Toast Benedict:; 2 English muffins; 1 avocado; Juice of 1/2 lime; 1/8 teaspoon curry powder; Small handful cilantro, torn; Salt and pepper, to taste; 4 eggs; 1/4 cup Hollandaise sauce; Microgreens, for garnish; Pinch black mustard seeds, for garnish; For the hollandaise:; 2 1/2 sticks butter; 2 egg yolks; 2 tablespoons fresh lemon juice; 1/4 teaspoon salt and black pepper (plus more, to taste); 1/8 teaspoon cayenne pepper; 1/2 teaspoon dry ground mustard; A pinch of white pepper