How to Make It
Whisk together the olive oil and lemon juice; season with salt and pepper.
Bring a medium saucepan of lightly salted water to a boil. Add the green beans and cook until crisp-tender, about 5 minutes. Drain the beans in a colander set in the sink and refresh them under cold water; pat dry.
Arrange the lettuce, radicchio, fennel, green beans, tomatoes, basil and Parmesan on a platter and drizzle with some of the vinaigrette. Serve the crudités immediately and pass the remaining vinaigrette separately.