Spring Vegetable Tartine with White Anchovies

Name: Spring Vegetable Tartine with White Anchovies
Ingredients: Lemon Aioli:; 1 garlic cloves, or more to taste, sliced; 1/4 teaspoon kosher salt; 1 tablespoon lemon juice; 1 teaspoon lemon zest (preferably from Meyer lemon); 1 pinch cayenne pepper; 3/4 cup mayonnaise; Tartine:; 4 large thick slices day-old French bread; 16 white anchovy fillets; 3/4 cup curly endive, torn into bite-size pieces; 3/4 cup shaved rainbow carrot strips; 1/2 cup very thinly sliced radishes; 1 squeeze lemon juice; 1 drizzle olive oil; 4 edible flowers, such as nasturtium or calendula (optional); 1 tablespoon baby parsley leaves