Preparation Bring artichokes, 6 cups broth, and next 5 ingredients to boil in large saucepan, adding more broth if necessary to cover. Reduce heat; cover and simmer until artichoke hearts are very tender, about 50 minutes. Chill artichokes in broth mixture, uncovered, until cold, at least 2 hours and up to 1 day. Remove artichokes from broth; drain. Pull off leaves. Cut hearts into 1/3-inch cubes; place in large bowl. Mix beans, cheese, 1/4 cup chopped basil, and 2 tablespoons oil into hearts. Season with salt and pepper. Preheat oven to 400°F. Arrange bread on rimmed baking sheet. Brush with oil. Bake until beginning to crisp, about 8 minutes Spoon artichoke topping onto bread. Squeeze lemon juice over; top with basil leaf.
Preparation Bring artichokes, 6 cups broth, and next 5 ingredients to boil in large saucepan, adding more broth if necessary to cover. Reduce heat; cover and simmer until artichoke hearts are very tender, about 50 minutes. Chill artichokes in broth mixture, uncovered, until cold, at least 2 hours and up to 1 day. Remove artichokes from broth; drain. Pull off leaves. Cut hearts into 1/3-inch cubes; place in large bowl. Mix beans, cheese, 1/4 cup chopped basil, and 2 tablespoons oil into hearts. Season with salt and pepper. Preheat oven to 400°F. Arrange bread on rimmed baking sheet. Brush with oil. Bake until beginning to crisp, about 8 minutes Spoon artichoke topping onto bread. Squeeze lemon juice over; top with basil leaf.