Shrimp and tomato salad

Boil the shrimp in salted water, cast in a colander and rinse with cold water. Boil a small amount of water, salt and put green beans. Cook for 5 minutes, then cast in a colander and rinse with cold water. Chop tomatoes and cucumbers, dice or crumble. Make the sauce. Mix 3 teaspoons of lemon juice, zest, olive oil, finely chopped spring onions and oregano leaves, mustard, sugar, pepper, salt. Mix the salad ingredients, season with the prepared sauce and mix.