In a large mixing bowl, combine ground beef, green pepper, onion, eggs, seasoned bread crumbs, salt and pepper. Mix thoroughly.
Shape the meat mixture into large meatballs about 2 inches in diameter. Place about 1 inch apart on a large, shallow baking sheet. Bake in a preheated oven for 30 minutes. While meatballs are baking, start the sauce.
In a 9x13 inch baking dish, mix the soup, mushrooms, sour cream, milk, browning sauce, salt and pepper to taste. Blend well.
When the meatballs have finished baking, remove them from the baking sheet and place them into the soup mixture. Stir in the meatballs to coat. Return to the preheated oven and bake for 20 to 30 minutes, or until sauce begins to bubble.