For the trout with asparagus, first peel the white asparagus. Cut off the ends of the white and green asparagus.
Bring water to a boil. Add salt and sugar and cook the asparagus until al dente. Quench. Then cut in half lengthwise.
Salt trout fillets and drizzle lemon juice over them. Fry in a little oil, skin side down, for about 3-4 minutes. Turn over and finish frying for another 2 minutes.
Peel and slice the grapefruit. Drizzle with a little sugar and caramelize with a Bunsen burner (alternatively, you can caramelize them for 2 minutes using the oven’s grill function).
Sauté the asparagus in a little olive oil, season with salt and pepper.
Arrange trout with asparagus and grapefruit slices and garnish with fresh herbs.