I loved this dish. Actually, I've never had the carb-version of rice balls, but they sounded good; and I figured we keto peeps can make cauliflower work in almost everything, so I gave it a go. Success! Here are the instructions:
Microwave one package of green giant riced cauliflower for 5 minutes, then put in a bowl to cool a bit. Add a cup of parmasean or romano cheese, a half-cup of Rao's no-sugar marinara, 3 eggs, and mix together. Press half this mixture into a casserole dish.
Brown a pound of ground beef and a half-pound of ground pork in a skillet. Add in a half cup each of chopped onion and celery along with several cloves of garlic to taste and cook til soft. Once the mixture is cooked through, add in another half-cup of the Rao's.
Put half the ground beef mixture on top of the cauliflower mixture in the casserole dish, top with mozzarella cheese, then layer cauliflower, meat, and mozzarella again. Bake 350 degrees for about 20 minutes until the casserole is bubbly and lightly browned.
Six servings, by my count approximately 4 carbs, 41 protein, 33 fat per serving.