Add the lime juice, garlic, cilantro/tarragon, jalapeno, cucumber, sugar, and salt (to taste) to a blender and blitz until combined. Taste and adjust seasoning.
Drain a can of white beans and toss with the aguachile marinade until coated. Pour into a container and let it marinate overnight or for up to 3 days.
Before serving, soak thinly sliced red onion & radiahes in ice cold water for 2 mins. Drain and garnish.
Serve with toasted bread.
