Grill Portabello about 5 minutes a side
Spread bun with vegan Aioli Spread (recipe below) or mayo mixed with a little garlic and lemon juice
Place grilled mushroom on bun. Drizzle with reduced balsamic vinegar (below) or just balsamic vinegar
Grilled onions good on it too...
Vegan Aioli Spread
1/4 C olive oil
1 clove garlic
1/4 C vegan mayo
2 t lemon juice
1/2 t dijan mustard
1/2 t rosemary
1/8 t pepper
Reduced Balsamic
1 C balsamic vinegar
2 t sugar
2 T water
Boil then simmer 25 minutes
Should have around 1/3 C