Grilled Vegetable Sandwiches

When I made Chicken and Ratatouille earlier in the week, I grilled double the amount of vegetables to use for this sandwich later in the week. Here was the makeup of the sandwich:

Pesto mayo
Grilled vegetables (zucchini, summer squash, red pepper, tomato, onion)
Muenster Cheese

I brushed the bread with olive oil and grilled the sandwiches on the grill pan. Yum!