Set the grill temperature to about 200F.
Add burger ingredients (except for the bell pepper and green onion) to a food processor or blender and pulse until you make minced shrimp. Once the mince is made, dump it in a bowl then add chopped bell pepper and green onion (and any other crispy veggie of your choice).
Form patties and place them in the fridge for about 20 minutes before placing them on the grill.
Place the burgers on the grill and cook them for about 15 to 20 minutes, about 8 to 10 minutes each side. I personally like to smoke these patties so the temperature should be a little lower so you can cook them longer.
Remove the gills from large portobello mushroom caps, brush them with olive oil and place them on. Grill for about 10-15 minutes.
Assemble the burger. Devour. Boom.