Toast 12 small tortillas. Lay tortillas out on counter. Line each tortilla with a piece of lettuce and spread the fish on top. Cover with 2 tablespoons of cucumber relish, a dab of avocado, a tablespoon of sweet peas, a few slices of radish and a pinch of cilantro. Finish each with a squeeze of lime and a teaspoon of olive oil. Serve immediately.