1Tablespoonfresh thyme, finely chopped or 1/2 tsp dried
1Tablespoonfresh oregano, finely chopped or 1/2 tsp dried
Pinch salt
Freshly ground pepper
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Instructions
For the bacon jam: In a frying pan over medium heat, fry bacon until the fat has rendered off and it is starting to brown. Remove the bacon to a bowl, then remove all but 1 Tbsp. of bacon fat from the frying pan. Add the onion and shallot to the pan and cook until they are softened and translucent. Add to the pan the coffee, cider vinegar, brown sugar and maple syrup. Bring mixture to a boil, then reduce heat to medium-low. Add bacon back to the pan and stir to coat. Simmer, stirring regularly, on medium low until most of the liquid has evaporated and it is thick and syrupy, 5-10 minutes. Use immediately or remove to a bowl and allow to cool slightly, then cover and refrigerate until needed.
For the Herb Mayo: Combine all ingredients in a small bowl. Allow to stand at room temperature while you prepare the burgers or cover and refrigerate if making ahead.
For the burgers: Heat grill to medium-high. Brush portobello mushrooms with olive oil and season with salt and pepper. Place mushrooms on grill with the round top side up. Grill for a couple of minutes, then flip. Fill mushroom with bacon jam and continue grilling a couple of minutes more. Move mushrooms to top tray. Top with one or two slices of provolone cheese. Close grill lid and allow to heat until the cheese is melted. Toast burger buns, if desired.
To serve: Spread some of the herb mayo on both top and bottom of burger bun. Place some leaf lettuce on the bottom piece of bun. Top with mushroom. Place top of bun on. Enjoy!
Notes
Vegetarian Bacon Jam Option: If you're up for trying to make vegetarian bacon jam, my best advise would be to start the recipe with the sautéeing of the shallots and onions in a little olive oil, then add your veggie bacon and cook as needed (depending on the type), then add the rest of the ingredients. Simmer per the recipe until syrupy. Even though it's meatless, refrigeration is recommended.Air Fryer Option: No BBQ?You can make the mushroom part in an air fryer. Try Air fry at 380F for 4 minutes, then open and shake basket. Air fry a further 4-6 minutes, or until mushrooms are golden.Oven Baked Option: Preheat oven to 400F. Place mushrooms on a baking sheet a even layer. Roast in oven for 15-20 minutes. (If you have a convection oven, reduce oven temperature to 375F and use the Convection setting instead. Check a little earlier, for done-ness.)