Preheat oven to 375 degrees. Prepare a baking sheet fitted with a wire rack and coat with cooking spray. Set aside. In a large bowl, thoroughly mix together all of the meatball ingredients. Using your hands, form 2-inch meatballs and place on the wire rack with an inch of space in between meatballs. Bake for 10-12 minutes, until internal temperature of meatballs reach 160 degrees. While meatballs cook, place spinach, dill, garlic, pine nuts, lemon juice and a pinch of salt and pepper in the bowl of a food processor. Process while drizzling olive oil in through the vegetable shoot, until desired consistency is reached. Taste and adjust seasoning, if necessary.