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1
In a zip and seal plastic bag, place mushrooms that have been cleaned and stemmed.
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2
Pour in marinade and mix gently to cover the mushrooms.
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3
Seal the bag and place in the fridge for about 1 hour or longer.
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4
For the bacon version: In large saute pan over medium heat, fry bacon until crispy.
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5
Remove bacon from the pan and drain it on a paper towel.
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6
Leave bacon grease in pan.
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7
Toss sliced onion into the same pan with the bacon grease and cook over medium high heat until they are caramelized and cooked to your liking, stirring a couple of times as you go.
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8
Set aside caramelized onion for topping later.
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9
For the vegetarian version: If you want to omit bacon, heat a pan over medium high heat and melt the butter.
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10
Then toss in sliced onion and cook until they are caramelized and cooked to your liking, stirring a couple of times as you go.
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11
Set aside caramelized onion for later.
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12
Heat a grill to medium high heat.
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13
Remove mushrooms from the marinade.
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14
Place mushrooms onto the grill and allow them to cook for about 4-5 minutes depending on grill.
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15
When they have heated and left grill marks on the bottom side, turn them over and allow to finish grilling on the other side.
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16
Remove them from the grill and set aside when cooked through.
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17
Toast burger buns on the grill or using your favorite method.
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18
Place a mushroom onto the bottom half of a bun and top with desired ingredients like onions, blue cheese crumbles, mayo and BBQ sauce.
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19
Add the top of the bun.
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20
Promptly devour.
