Vegan Grilled Portobello Burgers

Ingredients

• 1/4 cup canola or vegetable oil
• 1/4 cup balsamic vinegar
• 2 Tbsp. dry white vermouth
• 2 tsp. garlic powder
• 2 tsp. onion powder
• 1 tsp. Old Bay Seasoning
• 2 tsp. low-sodium soy sauce
• 1/2–1 tsp. Tabasco sauce
• 2 jalapeños, finely chopped
• 1/2 tsp. freshly ground white pepper
• 2 Anaheim peppers, seeded and each carved into 2 wedges
• 8 portobello mushrooms, black gills under the caps scraped out
• 2 -3 tsp. chopped fresh tarragon leaves
• 1/4 cup vegan mayonnaise
• 4 burger buns
• 4 romaine lettuce leaves, halved and trimmed to fit inside the rolls
• 1 tomato, sliced
• 1 red onion, thinly sliced