Couscous stuffed Artichokes

Name: Couscous-stuffed Artichokes
Ingredients: for the couscous; 1 garlic clove, smashed; 1 tablespoon butter; 1 1/2 cups chicken broth; 1 teaspoon kosher or sea salt; 1 cup couscous; for the artichokes; 2 large artichokes; kosher or sea salt; 1/2 lemon, plus 1 slice; 1 cup cooked couscous; 2 cloves garlic, minced; 2 tablespoons parsley, finely chopped; 2 teaspoons lemon zest; pepper to taste; 1/4 cup frozen peas; 1/2 cup Parmigiano Reggiano, plus 2 tablespoons; olive oil; 4 tablespoons melted butter