How to Make It
Season the pork with the celery seeds, salt and pepper. Let stand for 30 minutes.
Light a grill or preheat a grill pan and brush with oil. Grill the pork over moderately high heat, turning occasionally, until lightly charred all over and an instant-read thermometer inserted in the thickest part registers 140°, about 12 minutes. Transfer to a work surface and let rest for 5 minutes, then slice the meat against the grain.
Meanwhile, brush the bread with oil and season with salt and pepper. Grill over moderately high heat, turning, until lightly charred on both sides, about 2 minutes. Rub with the halved garlic clove.
In a large bowl, whisk the 1/4 cup of oil with the chile and minced garlic. Add the tomatoes and sliced celery and toss to coat. Season with salt and pepper.
Transfer the toasts to plates, top with the tomato salad and sliced pork and serve.