In large skillet cook beans in boiling lightly salted water for 3 minutes, drain. Transfer to a bowl of ice water to stop cooking. Drain again, set aside.
In the same skillet cook bacon to your liking of doneness. Remove onto plate to rest. Reserve about 1 tablespoon of the bacon drippings in skillet; discard the remaining drippings.
Cook Cremini mushrooms in the reserved drippings over medium-high heat for 4-5 minutes, until lightly browned, stirring occasionally. Stir in garlic. Cook and stir for 1 additional minute. Remove from heat. Stir in green beans.
For sauce, in a medium saucepan melt butter over medium heat. Stir in flour. Cook and stir for 1 minute. Stir in half-and-half. Cook and stir over medium heat until thickened and bubbly. Remove from heat. Stir in half of bacon, herbs, salt, and pepper.
Stir the sauce into the bean mixture. Spoon into a 2-quart square baking dish. Bake for 30 minutes. Top with remaining bacon. Bake for 5 additional minutes.
Sign up for sizzle
Get on our mailing list to receive special offers and promotions and to hear about our latest, most delicious news and events.