Eggs: 150g (3 large), Asparagus: 100g (10 spears, trimmed and cut into 1-inch pieces), Shallot: 20g (1 small, minced), Gruye cheese: 30g (1 oz, grated), Fresh tarragon: 2g (1/2 tsp, chopped), Butter: 10g (2 tsp, divided), Salt: 1g (1/4 tsp), Black pepper: 1g (1/4 tsp), Lemon zest: 2g (1/2 tsp), Whole grain toast: 30g (1 slice, for serving)