A shrimp salad came to mind when I spotted a box of glistening green tomatoes at the vegetable store. Don’t know why, but the idea of fat, crispy shrimps nestling in a big bowl loaded with a tumble of fresh, emerald tomatoes, crunchy cucumbers and fragrant herbs set off my imagination. Then I thought, a big bowl of that doused with an Asian-style dressing, all salty and lemony would make…