Preheat oven to 400 degrees and line baking sheet with parchment paper
Remove stems from 6 mushroom caps, place on baking sheet, and brush with liquid Aminos on both sides
Bake for 10 minutes, then flip and bake 10 minutes on other side, set aside to cool
Mix Hamburger seasoning into ground beef
Form into 3 burger patties
Cook burger in skillet or bake in oven until desire temp is reached
Chop mushroom stems and remaining mushrooms finely
Heat water and apple cider vinegar in small saucepan over med-high heat then add mushrooms
Stir in thyme, stevia, salt and pepper
Cook, stirring occasionally, for 23 minutes
Drain mushroom relish and place a spoonful in 3 mushroom caps
Add some spicy brown on top of relish
Top with burger and second mushroom cap
Serve extra mushroom relish on side