Zucchini Swedish Meatballs

1 small onion
2 small cans mushrooms, drained
3 eggs
1 t. salt
3 lbs. ground beef
2 c. grated zucchini
1 can cream of mushroom soup

Whirl onion, mushrooms eggs and salt in blender. Mix with ground beef and zucchini. Form into small meatballs. Bake on large shallow baking sheet 30 minutes at 350º F. Carefully pour off grease, saving gravy-type liquid that forms. Add cream of mushroom soup and serve over brown rice.