In a medium bowl, stir together the ground meat,
panko, egg, seeds,
thyme leaves, 1 teaspoon salt and a few grinds of black pepper. Roll into 12
meatballs (about 2½ tablespoons each) and nestle them among the blackberries in the
skillet. (The blackberries may not be in a single layer and that’s OK.) Broil until the blackberries are soft and the
meatballs are golden and cooked through, 15 to 20 minutes, turning them 1/2 way through.