Halve each zucchini lengthwise and scoop the flesh into a large bowl, leaving a hollow “shell”. Set shells aside.
Chop zucchini flesh; add remaining ingredients (ground lamb through egg) then, with your very clean hands, blend the mixture well.
Fill zucchini shells with lamb mixture (it’s okay to over-stuff them!) and place them on a grill tray or vegetable basket lined with foil wrap; loosely cover with more foil wrap, making sure it doesn’t touch the tops of the stuffed zucchini.
Place stuffed zucchini on grill; cover and cook for 20 to 35 minutes or until meat mixture is cooked through.
Remove foil wrap for the last 5 minutes of cooking time. If you don’t have a grill tray or basket, make a disposable one out of foil wrap.
Any extra lamb mixture can be shaped into meatballs and grilled.
Notes
SERVING SUGGESTION: Grilled eggplant and braised kale.