Grilled Summer Vegetable Focaccia Sandwich

This satisfying sammie is extremely adaptable: Tuck in some grilled chicken, add a little spicy salami or throw in even more veggies.

Ingredients:
2 heirloom tomatoes, thickly-sliced into rings
2 zucchini, sliced into long, thick wedges
1 Walla Walla sweet onions, peeled and thickly-sliced into rings
2 fennel bulbs, trimmed of green ends and thickly-sliced into rings
Olive oil
Sea salt and fresh ground pepper
Focaccia bread loaf
Lemon-Herb Mayonnaise (see recipe)

Method:
1. Preheat a gas or charcoal grill to medium-high heat. Spread the vegetables out on a baking sheet and drizzle with olive oil and season generously with salt and pepper.

2. Arrange the vegetables on the grill grate and cook 3-4 minutes per side, until all the veggies are softened and slightly charred. Remove and set aside.

3. Cut a loaf of focaccia in half lengthwise, and spread both sides with the Lemon-Herb Mayonnaise. Layer on the tomatoes, zucchini slices, fennel and onions rings on one side, season with a pinch of salt and pepper, then top with the other bread half. Cut into wedges and serve.