Langoustine with Zucchini Cake and Bean Salsa

For 4 portions: 8 langoustine, 2 zucchini, 2 tbsp. flour, 1 large egg, Italian seasoning, 1 can mixed beans, cilantro, lemon juice, diced tomato and bell pepper, olive oil, diced onion. For the bean salsa: Strain and wash the beans, add the chopped cilantro, onion, lemon juice, diced vegetables, olive oil, salt and pepper to taste. Mix well. For the zucchini cakes: Grate