How to Make It
Turn on broiler to high with oven rack in top position. Combine artichoke hearts, crabmeat, parsley, yogurt, mozzarella, Parmesan, lemon zest and juice, garlic, and black pepper in a large bowl; stir well to combine.
Spread about 2 tablespoons crab mixture on each baguette slice. Place on a baking sheet lined with aluminum foil. Broil until cheese begins to melt, 3 to 4 minutes (be careful not to burn toasts).