2 tablespoons unsalted butter
1 medium onion, finely chopped
1 teaspoon coarsely chopped thyme
1 quart creamy tomato soup, preferably Pacific Natural Foods brand
1 to 1 1/2 teaspoons jerk spice paste, like Walkerswood or Busha Browne’s
Salt and freshly ground black pepper
1/2 pound shelled, deveined medium shrimp
2 scallions, thinly sliced
Steamed rice and lime wedges, for serving