French Onion Soup Casserole

I found this recipe on Pinterest, I added some more broth to it to make it more soupy than casserole-y.
While the mixture was unexpected to me, it turned out great!

ingredients
3 tbs salted butter
3 large sweet onions
6oz package of shredded swiss cheese
1 can cream of chicken soup
2/3C almond milk
1 tsp soy sauce
4 beef bouillon cubes
4C boiling water
10oz package of garlic crostini (or loaf of French bread, sliced)

directions

1. Slice onions into thin strips.
2. Melt butter in a large saute pan over medium heat.
3. Add onions, saute until clear.
4. Dissolve bouillon cubes in 4C boiling water.
5. Add onions and beef broth to casserole dish.
6. In sauce pan, bring cream of chicken soup, milk, and soy sauce to a boil.
7. Pour soup mixture into casserole dish, stir gently to mix.
8. Top with crostini (or bread) slices.
9. Bake, uncovered, for 15 minutes.
10. Remove casserole from oven, push bread slices under soup to coat the top of the bread.
11. Top with shredded swiss cheese.
12. Place casserole back in the oven and finish baking for 15 more minutes.
13. Enjoy!