Step 1: Make the meatballs: Place the bread in a large mixing bowl. Pour the half and half over it and soak until soft, 5 minutes. Pour off the half and half (save it for cereal), then gently squeeze the bread in your fingers to wring out any excess.
Step 2: Add the pork, veal, shallot, ginger, allspice, salt, pepper, and egg. Wet your hands with cold water and knead the ingredients together with your fingers. (Sure, you could use a wooden spoon, but your hands are more efficient.) If you have time, chill the mixture for 30 minutes: It will be easier to shape.
Step 3: Divide the meat mixture into 12 equal portions. Roll each into a ball. Arrange on a plate lined with plastic wrap and refrigerate until ready for cooking. (You can make the meatballs several hours ahead.)
Step 4: Make the Lemon-Dill Sour Cream Sauce (click here for recipe) and keep refrigerated until serving time.
Step 5: Set up your grill for direct grilling and preheat to high. Brush and oil the grill grate.
Step 6: Place the meatballs in the grilling basket. Grill until browned and cooked through, 4 to 6 minutes per side. (The internal temperature of a meatball should be 160 degrees F.) Serve at once with the Lemon Dill Sauce for dipping.