Make Ahead Bacon and Cheddar Stuffed Mushrooms

1 Place bacon in a large, deep skillet.
2 Cook over medium high heat until evenly brown.
3 Drain, dice and set aside.
4 Preheat oven to 400 degrees F.
5 Remove mushroom stems.
6 Set aside caps.
7 Chop the stems.
8 In a large saucepan over medium heat, melt the butter.
9 Slowly cook and stir the chopped stems and onion until the onion is soft.
10 Remove from heat.
11 In a medium bowl, stir together the mushroom stem mixture, bacon and 1 cup Cheddar.
12 Mix well and scoop the mixture into the mushroom caps.
13 Bake in the preheated oven 15 minutes, or until the cheese has melted.
14 Remove the mushrooms from the oven, and sprinkle with the remaining cheese.
15 Put into the oven for a couple of seconds to melt if desired.
16 To freeze: Flash freeze them before baking in the oven.
17 A freezer bag would work great for storing these.
18 Let defrost and then add cheese and bake in oven for 15 minutes.