Preheat your oven to 350°F (175°C).

In a large bowl, combine the cream of mushroom soup, milk, and your spice mix. Stir until smooth.

Fold in the frozen green beans until evenly coated.

Transfer the mixture to a greased 9x13-inch baking dish.

Bake uncovered for 25–30 minutes, until the casserole is bubbly.

Remove from the oven, sprinkle French fried onions evenly on top, and bake an additional 5–7 minutes until golden brown.

Let rest for a few minutes, then serve and enjoy!