1. Preheat oven to 450ºF. Line a large, rimmed baking sheet with foil, set a wire rack on baking sheet and mist rack with cooking spray. Combine lamb, bread crumbs, egg, 1/2 cup water, coriander, garlic powder, 1/2 tsp. salt and 1/4 tsp. pepper in a large bowl. Mix gently but thoroughly with your hands. Moisten your hands with water and form lamb mixture into 1 1/4-inch balls; place on rack. Bake meatballs until just cooked through, 12 to 14 minutes.
2. While meatballs are baking, bring broth and spinach to a boil in a medium saucepan. Stir in couscous, cover, remove from heat and let stand for 5 minutes. Fluff couscous with a fork. Toss in apricots, olive oil and lemon juice. Season with salt. Divide couscous among 4 bowls; sprinkle with toasted sliced almonds, if desired. Top with meatballs and serve.