- 4 portobello mushroom caps
- Olive oil
- One 8-ounce jar of sun-dried tomatoes in oil
- 8 ounces of baby spinach
- 1 red onion, sliced into 1/4-inch rounds
- 4 hamburger buns
1 Prepare your grill for high, direct heat.
2 While the grill is heating, if you wish, …read more