Portabella Mushroom Burgers

Preheat a charcoal or propane grill. This can also be done on a grill pan on the stove.

Lightly wipe mushroom caps with a wet rag to remove any dirt. Once grill or pan is heated, brush mushrooms on one side with the Italian dressing. Put dressing side down on the grill and cook for about 4 minutes. Brush the side facing up with Italian dressing and flip the mushrooms. Cook another 4 minutes and remove. You want the mushrooms to be cooked through but not get flimsy.

While mushrooms are cooking, cut tomato and onion.

Spread about 1 tablespoon of pesto on each bun and top with about 1 tablespoon of feta. Put a cooked mushroom on top of the feta and dress with tomato, onion, and a few spinach leaves.