Step 1

Bring a large pot of salted water to a boil.

Step 2

Cook green beans for 3-5 minutes.

Step 3

Drain the green beans and immediately place them into a large bowl filled with ice water to stop the cooking process.

Step 4

Drain again and set aside.

Step 5

Preheat oven to 400 degrees F.

Step 6

Place diced bacon in a cast iron skillet* and cook over medium heat for 5 minutes, stirring regularly.

Step 7

Stir in the mushrooms, salt, and pepper and cook for about 4 to 5 minutes, stirring regularly.

Step 8

Add the garlic and cook for another 30 seconds.

Step 9

Stir in flour and cook for 1 minute.

Step 10

Add the broth and simmer for 1 minute, gently scraping up any brown bits.

Step 11

Lower the heat to medium-low and slowly stir in the half-and-half.

Step 12

Cook for about 6-8 minutes, or until the mixture has thickened, stirring occasionally.

Step 13

Remove from the heat.

Step 14

Gently stir in the green beans and half the can of onion rings (about 3/4 cup).

Step 15

Top with shredded cheddar cheese and remaining onion rings.

Step 16

Bake for 10-15 minutes, or until heated through and bubbly.

Step 17

Serve immediately.