1. Preheat BBQ to medium-high. 2. Brush mushroom caps on both sides with olive oil. 3. Put mushroom caps stem side down on greased grill; cook with lid down, for 3-4 minutes. 4. Turn; sprinkle with salt and pepper. 5. Cook for 2-4 minutes, till tender. 6. Just before mushrooms are ready, split the buns; grill cut sides down, until lightly toasted. 7. Brush toasted side of bun each with pesto. 8. Pile 1/4 cup lightly packed baby spinach leaves on bottom half of each bun. 9. Top each with a mushroom cap, 2 tbsp asiago cheese and 1 tomato slice. 10. Replace top of buns. ---------------------------------------------------------------------------
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Ingredients