Place green beans and chicken broth in a medium saucepan. Add just enough water to cover green beans. Bring to a boil and simmer 10-12 minutes. Drain.
Preheat oven to 350 degrees and lightly grease a 1 1/2-quart baking dish.
Melt butter in a large skillet. Add mushrooms and cook until golden brown, stirring occasionally.
In a large bowl, mix together mushrooms, green beans, condensed mushroom soup, milk, cheddar, 1/2 cup of the French-fried onions, and soy sauce, and pepper.
Transfer mixture to prepared baking dish, Top with remaining onions.
Place in oven for 25-30 minutes, until bubbly and golden brown.
Notes
Can be assembled a day in advance. Wait until just before baking to add the onion topping.Canned green beans can be used instead of fresh. You will not need the chicken broth.Nutritional info is provided as an estimate only and will vary based on brands of products used.