Combine wild rice, ground beef, onion, garlic, salt and milk; shape into 1" balls. Arrange in 10x15" jelly roll pan. Bake in a preheated 375 degree oven until lightly browned (about 15 minutes). Combine remaining ingredients except potatoes or rice in 2 quart casserole, stir in meatballs. Bake, covered, until bubbly in center (about 40 minutes). Serve over hot cooked rice or mashed potatoes.