You could take nuts, mozzarella cheese sticks, hardboiled eggs, raw veggies and hummus dip, lunchmeat wraps (with cheese and wrapped in a lettuce leaf), roasted chick peas.
It's best to start out Ph2 slowly, adding back one thing at a time. A two-slice sandwich would be two grains plus a fruit, and it's possible it might set off some cravings.
Life's a journey, not a destination.
It's easier to stay on plan than to get back on plan.