Preheat oven to 400°F.

In a large pot add water and bring it to a boil.

Once water is boiling add green beans and cook them for 5 minutes.

Remove green beans from boiling water and place them in ice water bath to stop the cooking.

Drain green beans and put them into a 9 x 13 inch casserole dish.

Place a large pot on medium heat, add olive oil, garlic, and onion. Sauté until onions are transparent.

Add mushrooms and salt to taste. Cook for another 2-3 minutes.

Whisk in flour and coat the veggies. Cook for 1 minute.

Add in the vegetable broth slowly while whisking.

Add nondairy milk with a whisk. Cook for 5-7 minutes until it is thick and bubbly.

Taste to see if you need more salt.

Remove from heat and pour over green beans. Stir if needed.

Place the fried onions on top of green bean casserole.

Bake for 15-20 minutes or slightly golden brown.