In a small bowl, soak the bread chunks in 1/2 cup milk, while frying the onions and ground beef.
Heat the oil in a large cast iron skillet and saute the onions over a low heat for ten minutes, or until starting to brown.
Add the beef, curry, lemon juice, nuts, raisins, salt and pepper to the skillet and brown until beef is cooked through and no longer pink, stirring often. If not using a cast iron skillet, spoon beef into an ovenproof dish.
Mix the other 1/2 cup of milk and 2 beaten eggs into the bread chunks. Season with salt and pepper, if desired, and pour gently over the beef, spreading it over the whole dish.
Put dish in the oven for 1 to 1-1/4 hours. The top of the bobotie should be set and golden brown.