Mom's Zucchini Soup

Ingredients (7)

• + 2 tablespoons margarine add to pantry
• ✓ 4 onions, minced
• + 2 cups sliced zucchini add to pantry
• + 4 cups chicken stock, divided add to pantry
• + 1 cup milk add to pantry
• ✓ salt and ground black pepper to taste
• + salt and ground black pepper to taste add to pantry